CN115864830B - Negative pressure divides two conversion circuit and equipment terminal - Google Patents
Negative pressure divides two conversion circuit and equipment terminalDownload PDFInfo
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- CN115864830B CN115864830BCN202310112881.5ACN202310112881ACN115864830BCN 115864830 BCN115864830 BCN 115864830BCN 202310112881 ACN202310112881 ACN 202310112881ACN 115864830 BCN115864830 BCN 115864830B
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Abstract
Description
Technical Field
The application relates to the field of voltage conversion, in particular to a negative pressure divided-by-two conversion circuit and a device terminal.
Background
The charge pump can perform high-efficiency voltage conversion on the input voltage, and the principle is that the flying capacitor is utilized to store charge energy of the input voltage, and then nodes at two ends of the flying capacitor are switched at proper switching frequency through the switching tube, so that voltage conversion can be completed.
In the traditional negative pressure charge pump, two flying capacitors with the same capacitance value are connected in series to perform serial voltage division so as to realize the voltage division function, however, if the input voltage is perfectly divided by two, the symmetrical capacitance values of the two capacitors and the symmetrical charge-discharge period duration are usually required, if the symmetrical condition is not satisfied, the absolute value of the voltage of the middle node of the capacitor serial body is not equal to half of the input voltage any more, and at the moment, the ripple is overlarge in the target output voltage of the negative pressure charge pump.
Disclosure of Invention
In view of this, the present application provides a negative pressure divided-by-two conversion circuit and an apparatus terminal capable of reducing a ripple value corresponding to a target output voltage.
A negative pressure divided-by-two conversion circuit comprising:
the first end of the basic negative pressure generating unit is used for connecting input voltage during gating, the second end of the basic negative pressure generating unit is used for being grounded during gating, only one end of the first end and the second end of the basic negative pressure generating unit is gated at any time, and the third end of the basic negative pressure generating unit is used for being grounded during gating of the first end of the basic negative pressure generating unit.
The first end of the negative pressure divide-by-two conversion unit is used for being electrically connected with the fourth end of the basic negative pressure generation unit during gating, the second end of the negative pressure divide-by-two conversion unit is used for outputting target negative pressure during gating, the third end of the negative pressure divide-by-two conversion unit is used for outputting target negative pressure during gating of the first end of the negative pressure divide-by-two conversion unit, the fourth end of the negative pressure divide-by-two conversion unit is used for being grounded during gating of the second end of the negative pressure divide-by-two conversion unit, and only one end of the first end and the second end of the negative pressure divide-by-two conversion unit is gated at any moment, and the target negative pressure is half of input voltage.
The port gating control unit is respectively and electrically connected with the control ends of the basic negative pressure generating unit and the negative pressure dividing and converting unit and is used for respectively outputting corresponding gating control signals to the basic negative pressure generating unit and the negative pressure dividing and converting unit.
According to the first group of gating control signals, the first end and the third end of the basic negative pressure generating unit are respectively gated and form a passage between the two corresponding ports so as to enable the basic negative pressure generating unit to charge, and the second end and the fourth end of the negative pressure dividing and converting unit are respectively gated and form a passage between the two corresponding ports so as to enable the negative pressure dividing and converting unit to discharge.
According to the second group of gating control signals, the second end, the fourth end, the first end and the third end of the basic negative pressure generating unit are respectively gated and sequentially connected into a passage, so that the basic negative pressure generating unit discharges and charges the negative pressure dividing conversion unit.
In one embodiment, the base negative pressure generating unit includes:
the first end of the first switch switching unit is used for being connected with the input voltage when the switch is switched on, the second end of the first switch switching unit is used for being grounded when the switch is switched on, and only one end of the first end and the second end of the first switch switching unit is switched on at any time.
The first end of the first capacitor is electrically connected with the third end of the first switch switching unit.
The first end of the first switch unit is electrically connected with the first capacitor, and the second end of the first switch unit is grounded.
The control ends of the first switch switching unit and the first switch unit are respectively and electrically connected with the port gating control unit.
In one embodiment, the first switch switching unit includes:
the first end of the second switch unit is used for being connected with the input voltage, and the second end of the second switch unit is electrically connected with the first end of the first capacitor.
The first end of the third switch unit is electrically connected with the first end of the first capacitor, and the second end of the third switch unit is grounded.
The control ends of the second switch unit and the third switch unit are respectively and electrically connected with the port gating control unit.
In one embodiment, the first switching unit employs an NMOS transistor.
In one embodiment, the second switching unit is a PMOS transistor, and the third switching unit is an NMOS transistor.
In one embodiment, the negative pressure divided-by-two conversion unit includes:
the first end of the second switch switching unit is used for being electrically connected with the second end of the first capacitor when the gating is switched, and the second end of the second switch switching unit is used as a first voltage output end and outputs the converted voltage when the gating is switched.
The first end of the second capacitor is electrically connected with the third end of the second switch switching unit.
The first end of the third switch switching unit is electrically connected with the second end of the second capacitor, the second end of the third switch switching unit is used as a second voltage output end and outputs converted voltage when the switch is turned on, and the third end of the third switch switching unit is used for being grounded when the switch is turned on.
The control ends of the second switch switching unit and the third switch switching unit are respectively and electrically connected with the port gating control unit.
In one embodiment, the second switch switching unit includes:
and the first end of the fourth switch unit is electrically connected with the fourth end of the basic negative pressure generating unit, and the second end of the fourth switch unit is electrically connected with the first end of the second capacitor.
And the second end of the fifth switch unit is used for outputting target negative pressure when the corresponding switch is conducted.
The control ends of the fourth switch unit and the fifth switch unit are respectively and electrically connected with the port gating control unit.
In one embodiment, the third switch switching unit includes:
and the second end of the sixth switch unit is used for being electrically connected with the second capacitor.
And the first end of the seventh switch unit is electrically connected with the second capacitor, and the second end of the seventh switch unit is grounded.
The control ends of the sixth switch unit and the seventh switch unit are respectively and electrically connected with the port gating control unit.
In one embodiment, the fourth, fifth, sixth and seventh switching units each employ NMOS switching transistors.
An equipment terminal comprises the negative pressure divided-by-two conversion circuit.
In the negative pressure divide-by-two conversion circuit, the first end of the basic negative pressure generating unit is used for connecting input voltage during gating, the second end of the basic negative pressure generating unit is used for grounding during gating, the first end and the second end of the basic negative pressure generating unit are only one end of the basic negative pressure generating unit at any time, the third end of the basic negative pressure generating unit is used for grounding during gating of the first end of the basic negative pressure generating unit, the first end of the negative pressure divide-by-two conversion unit is used for being electrically connected with the fourth end of the basic negative pressure generating unit during gating, the second end of the negative pressure divide-by-two conversion unit is used for outputting target negative pressure during gating, the third end of the negative pressure divide-by-two conversion unit is used for outputting target negative pressure during gating of the first end of the negative pressure divide-by-two conversion unit, the fourth end of the negative pressure divide-by-two conversion unit is used for grounding during gating of the second end of the negative pressure divide-by-two conversion unit, the first end and the second end of the negative pressure secondary-removing conversion unit are only gated at one end at any moment, the target negative pressure is half of the input voltage, the port gating control unit is respectively and electrically connected with the control ends of the basic negative pressure generation unit and the negative pressure secondary-removing conversion unit, and is used for respectively outputting corresponding gating control signals to the basic negative pressure generation unit and the negative pressure secondary-removing conversion unit, according to a first group of gating control signals, the first end and the third end of the basic negative pressure generation unit are respectively gated and form a passage between the corresponding two ports so as to charge the basic negative pressure generation unit, the second end and the fourth end of the negative pressure secondary-removing conversion unit are respectively gated and form a passage between the corresponding two ports so as to discharge the negative pressure secondary-removing conversion unit, according to a second group of gating control signals, the second end and the fourth end of the basic negative pressure generation unit, the first end and the third end of the negative pressure divide-by-two conversion unit are respectively gated and sequentially connected into a passage so as to enable the basic negative pressure generation unit to discharge and charge the negative pressure divide-by-two conversion unit, and the negative pressure divide-by-two conversion circuit respectively gates and forms a passage between the corresponding two ports by utilizing the first end and the third end of the basic negative pressure generation unit under a first group of gating control signals so as to enable the basic negative pressure generation unit to charge and output target negative pressure by utilizing the second end of the negative pressure divide-by-two conversion unit; then according to the second group of gating control signals, the second end, the fourth end and the first end and the third end of the basic negative pressure generating unit are respectively gated and sequentially connected into a passage, so that the basic negative pressure generating unit discharges and charges the negative pressure dividing and converting unit, at the moment, the third end of the negative pressure dividing and converting unit gates and outputs target negative pressure, namely the target negative pressure of the negative pressure dividing and converting unit is always half of the input voltage, when the load is relatively smaller, the negative pressure dividing and converting unit can be controlled to be in a discharging state for a long time by adjusting the period duration of the first group of gating control signals and the second gating control signals, the negative pressure dividing and converting unit is only adjusted to be in a charging state when the corresponding target negative pressure is insufficient, the switching frequency of the whole negative pressure dividing and converting circuit is reduced, and the ripple value of the corresponding target negative pressure can be controlled by controlling the charging duration of the negative pressure dividing and converting unit; when the load is relatively large, full-time energy supply output of the target negative pressure can be realized, and at the moment, the ripple wave of the target negative pressure is equivalent to half of the ripple wave value of the traditional negative pressure divided by two charge pumps, namely, the symmetrical requirement of the traditional negative pressure divided by two conversion circuits is not needed, and the ripple wave of the output voltage is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a circuit block diagram of a negative pressure divided-by-two conversion circuit according to an embodiment of the present application;
fig. 2 is a schematic circuit diagram of a negative voltage divided-by-two conversion circuit according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. Based on the examples in the present application. The various embodiments described below and their technical features can be combined with each other without conflict.
As shown in fig. 1, a negative pressure divided-by-twoconversion circuit 100 is provided, the negative pressure divided-by-twoconversion circuit 100 includes: a base negativepressure generating unit 110, a negative pressure dividing-by-two convertingunit 120, and a portgating control unit 130.
Thefirst end 1a of the basic negativepressure generating unit 110 is used for switching in an input voltage during gating, thesecond end 1b of the basic negativepressure generating unit 110 is used for grounding during gating, only one end of thefirst end 1a and thesecond end 1b of the basic negativepressure generating unit 110 is gated at any moment, and thethird end 1c of the basic negativepressure generating unit 110 is used for grounding during gating of thefirst end 1a of the basic negativepressure generating unit 110.
Thefirst end 2a of the negative pressure dividing and convertingunit 120 is electrically connected to thefourth end 1d of the basic negativepressure generating unit 110 during gating, thesecond end 2b of the negative pressure dividing and convertingunit 120 is used for outputting a target negative pressure during gating, thethird end 2c of the negative pressure dividing and convertingunit 120 is used for outputting a target negative pressure during gating of thefirst end 2a of the negative pressure dividing and convertingunit 120, thefourth end 2d of the negative pressure dividing and convertingunit 120 is used for grounding during gating of thesecond end 2b of the negative pressure dividing and convertingunit 120, only one end of thefirst end 2a and thesecond end 2b of the negative pressure dividing and convertingunit 120 is gated at any moment, and the target negative pressure is half of the input voltage.
The portgating control unit 130 is electrically connected to the control ends of the base negativepressure generating unit 110 and the negative pressure dividing and convertingunit 120, and is configured to output corresponding gating control signals to the base negativepressure generating unit 110 and the negative pressure dividing and convertingunit 120, respectively.
According to the first set of gating control signals, thefirst end 1a and the third end of the basic negativepressure generating unit 110 are respectively gated and form a path between the corresponding two ports, so that the basic negativepressure generating unit 110 charges, and thesecond end 2b and the fourth end of the negative pressure divided-by-two convertingunit 120 are respectively gated and form a path between the corresponding two ports, so that the negative pressure divided-by-two convertingunit 120 discharges.
According to the second set of gating control signals, thesecond end 1b, thefourth end 1d, thefirst end 2a and thethird end 2c of the basic negativepressure generating unit 110 and the negative pressure dividing and convertingunit 120 are respectively gated and sequentially connected into a path, so that the basic negativepressure generating unit 110 discharges and charges the negative pressure dividing and convertingunit 120.
When the first group of gate control signals operate, the portgate control unit 130 sends the first group of gate control signals to the control end of the basic negativepressure generating unit 110 and the control end of the negative pressure dividing and convertingunit 120, respectively.
When the second gating control signal works, the portgating control unit 130 sends the second gating control signal to the control end 1e of the basic negativepressure generating unit 110 and thecontrol end 2e of the negative pressure dividing and convertingunit 120, respectively.
It should be noted that, the control end 1e of the basic negativepressure generating unit 110 and thecontrol end 2e of the negative pressure dividing and convertingunit 120 may each include a plurality of ports, and for convenience, in fig. 1, the control end of the basic negativepressure generating unit 110 is denoted by 1e only, and the control end of the negative pressure dividing and convertingunit 120 is denoted by 2e.
When thefirst end 1a of the basic negativepressure generating unit 110 is connected to the input voltage, thethird end 1c of the basic negativepressure generating unit 110 is grounded, thesecond end 1b of the basic negativepressure generating unit 110 is not gated, and since thethird end 1c of the basic negativepressure generating unit 110 is grounded, a path is formed between thefirst end 1a and thethird end 1c of the basic negativepressure generating unit 110, and the basic negativepressure generating unit 110 is equivalent to performing charging.
When the basic negativepressure generating unit 110 charges, thesecond end 2b of the negative pressure dividing and convertingunit 120 gates and outputs the target negative pressure, thefourth end 2d of the negative pressure dividing and convertingunit 120 is grounded, at this time, thesecond end 2b and thefourth end 2d of the negative pressure dividing and convertingunit 120 form a path, the negative pressure dividing and convertingunit 120 discharges, and thesecond end 2b of the negative pressure dividing and convertingunit 120 outputs the target negative pressure.
When thesecond end 1b of the basic negativepressure generating unit 110 is grounded, thefirst end 1a of the basic negativepressure generating unit 110 and thefirst end 1c of the basic negativepressure generating unit 110 are not gated, thefirst end 2a of the negative pressure dividing and convertingunit 120 is electrically connected with thefourth end 1d of the basic negativepressure generating unit 110, thethird end 2c of the negative pressure dividing and convertingunit 120 outputs the target negative pressure, and at this time, thesecond end 1b, thefourth end 1d, thefirst end 2a and thethird end 2c of the basic negativepressure generating unit 110 are respectively gated and sequentially connected into a path, so that the basic negativepressure generating unit 110 discharges and charges the negative pressure dividing and convertingunit 120, and at this time, the third end of the negative pressure dividing and convertingunit 120 is gated and outputs the target negative pressure.
The negative pressure dividing and convertingcircuit 100 respectively gates the first end and the third end of the basic negativepressure generating unit 110 under the first group of gating control signals and forms a passage between the two corresponding ports, so that the basic negativepressure generating unit 110 charges, and the second end of the negative pressure dividing and convertingunit 120 is used for outputting the target negative pressure; then according to the second set of gating control signals, thesecond end 1b, thefourth end 1d and thefirst end 2a and thethird end 2c of the negative pressure divide-by-twoconversion unit 120 of the basic negativepressure generating unit 110 are respectively gated and sequentially connected into a channel, so that the basic negativepressure generating unit 110 discharges and charges the negative pressure divide-by-twoconversion unit 120, at this time, the third end of the negative pressure divide-by-twoconversion unit 120 gates and outputs a target negative pressure, i.e. the target negative pressure of the negative pressure divide-by-twoconversion unit 120 is always half of the input voltage and remains unchanged, when the load is relatively smaller, the negative pressure divide-by-twoconversion unit 120 can be controlled to be in a discharge state for a long time by adjusting the period duration of the first set of gating control signals and the second gating control signals, the negative pressure divide-by-twoconversion unit 120 is only adjusted to be in a charge state when the corresponding output target negative pressure is insufficient, the switching frequency of the whole negative pressure divide-by-twoconversion circuit 100 is reduced, and the ripple value of the corresponding target negative pressure can be controlled by controlling the charging duration of the negative pressure divide-by thesecond conversion unit 120; when the load is relatively large, full-time energy supply output of the target negative pressure can be realized, and at the moment, the ripple wave of the target negative pressure is equivalent to half of the ripple wave value of the traditional negative pressure divided by two charge pumps, namely, the symmetrical requirement of the traditional negative pressure divided by twoconversion circuit 100 is not needed, and the ripple wave of the output voltage is reduced as a whole.
In one embodiment, as shown in fig. 2, the base negativepressure generating unit 110 includes: a firstswitch switching unit 111, a first capacitor C1, and a first switch unit 112.
The first terminal of thefirst switching unit 111 is used for switching in an input voltage when switching the gate, the second terminal of thefirst switching unit 111 is used for grounding when switching the gate, and only one terminal of the first and second terminals of thefirst switching unit 111 is gated at any one time.
The first end of the first capacitor C1 is electrically connected to the third end of thefirst switch unit 111.
The first end of the first switch unit 112 is electrically connected to the first capacitor C1, the second end of the first switch unit 112 is grounded, and the control end of the first switch unit 112 is electrically connected to the portgating control unit 130.
In this embodiment, the first end of thefirst switching unit 111 corresponds to thefirst end 1a of the basic negativepressure generating unit 110, the second end of thefirst switching unit 111 corresponds to thesecond end 1b of the basic negativepressure generating unit 110, the second end of the first switching unit 112 corresponds to the third end 1C of the basic negativepressure generating unit 110, the second end of the first capacitor C1 corresponds to thefourth end 1d of the basic negativepressure generating unit 110, and the control end 1e of the basic negativepressure generating unit 110 includes the control ends of thefirst switching unit 111 and the first switching unit 112.
In this embodiment, when the first end of the firstswitch switching unit 111 switches to the gate-on input voltage, the second end of the first switch unit 112 is grounded, and at this time, the first capacitor C1 charges and stores energy until the voltage at both ends of the first capacitor C1 is the same as the input voltage, and at this time, thefourth end 1d of the basic negative pressure generating unit 110 (i.e., the second end of the first capacitor C1) is not electrically connected to thefirst end 2a of the negative pressure divided-by-two convertingunit 120, i.e., thefirst end 2a of the negative pressure divided-by-two convertingunit 120 is not gated; thesecond end 2b and thefourth end 2d of the negative pressure divided-by-twoconversion unit 120 form a path so that the negative pressure divided-by-twoconversion unit 120 discharges.
Similarly, when the second end of the firstswitch switching unit 111 is grounded, the first capacitor C1 and thefirst end 2a and the third end 2C of the negative voltage divide-by-twoconversion unit 120 are respectively gated and sequentially connected into a path, so that the base negativevoltage generating unit 110 discharges and charges the negative voltage divide-by-twoconversion unit 120.
The first capacitor C1 is an energy storage element, and the target negative pressure of the negative pressure divided-by-twoconversion unit 120 is always half of the input voltage and is kept unchanged by matching the firstswitch switching unit 111, the first capacitor C1 and the first switch unit 112, so that ripple waves of the output voltage are reduced.
In one embodiment, as shown in fig. 2, the firstswitch switching unit 111 includes: asecond switching unit 113 and athird switching unit 114.
The first end of thesecond switch unit 113 is used for accessing an input voltage, and the second end of thesecond switch unit 113 is electrically connected with the first end of the first capacitor C1.
The first end of thethird switch unit 114 is electrically connected to the first end of the first capacitor C1, and the second end of thethird switch unit 114 is grounded.
In this embodiment, the control terminals of thesecond switch unit 113 and thethird switch unit 114 are electrically connected to the portgating control unit 130.
In one embodiment, as shown in fig. 2, the first switch unit 112 employs an NMOS transistor N1.
In this embodiment, the first end of the first switch unit 112 is the drain of the NMOS transistor N1, the second end of the first switch unit 112 is the source of the NMOS transistor N1, and the control end of the first switch unit 112 is the gate of the NMOS transistor N1.
In one embodiment, as shown in fig. 2, thesecond switching unit 113 employs a PMOS transistor P1, and thethird switching unit 114 employs an NMOS transistor N2.
In this embodiment, the first end of the PMOS transistor of thesecond switch unit 113 is the source of the PMOS transistor P1, the second end of the PMOS transistor of thesecond switch unit 113 is the drain of the PMOS transistor P1, the control end of thesecond switch unit 113 is the gate of the PMOS transistor P1, and the gate of the PMOS transistor P1 is electrically connected to the port-gatingcontrol unit 130.
In this embodiment, the first end of thethird switch unit 114 is the source of the NMOS transistor N2, the second end of thethird switch unit 114 is the drain of the NMOS transistor N2, the control end of thefirst switch unit 114 is the gate of the NMOS transistor N2, and the gate of the NMOS transistor N2 is electrically connected to the portgating control unit 130.
In this embodiment, the switching between the charging and discharging states of the first capacitor C1 is achieved by the cooperation of the PMOS transistor P1 and the NMOS transistor N2.
In one embodiment, as shown in fig. 2, the negative pressure divided-by-twoconversion unit 120 includes a secondswitch switching unit 121, a second capacitor C2, and a thirdswitch switching unit 122.
The first terminal of thesecond switching unit 121 is electrically connected to the second terminal of the first capacitor C1 when the gate is switched, and the second terminal of thesecond switching unit 121 is used as a first voltage output terminal and outputs the converted voltage when the gate is switched.
The first end of the second capacitor is electrically connected to the third end of thesecond switch unit 121.
The first end of the thirdswitch switching unit 122 is electrically connected to the second end of the second capacitor, the second end of the thirdswitch switching unit 122 is used as a second voltage output end and outputs the converted voltage when the switch is turned on, and the third end of the thirdswitch switching unit 122 is used for being grounded when the switch is turned on.
The control ends of the secondswitch switching unit 121 and the thirdswitch switching unit 122 are respectively electrically connected to the portgating control unit 130.
In this embodiment, thecontrol end 2e of the negative pressure divided-by-twoconversion unit 120 includes respective control ends of the secondswitch switching unit 121 and the thirdswitch switching unit 122.
In one embodiment, as shown in fig. 2, thesecond switching unit 121 includes afourth switching unit 121a and afifth switching unit 121b.
The first end of thefourth switch unit 121a is electrically connected to thefourth end 1d of the basic negativepressure generating unit 110, and the second end of thefourth switch unit 121a is electrically connected to the first end of the second capacitor.
The first end of thefifth switch unit 121b is electrically connected to the first end of the second capacitor, and the second end of thefifth switch unit 121b is configured to output the target negative voltage when the corresponding switch is turned on.
In one embodiment, as shown in fig. 2, thethird switching unit 122 includes asixth switching unit 122a and aseventh switching unit 122b.
The first end of thesixth switch unit 122a is used for outputting a target negative voltage when the corresponding switch is turned on, and the second end of thesixth switch unit 122a is used for being electrically connected with the second capacitor;
the first end of theseventh switch unit 122b is electrically connected to the second capacitor, and the second end of theseventh switch unit 122b is grounded.
The control terminals of thesixth switch unit 122a and theseventh switch unit 122b are electrically connected to the portgating control unit 130, respectively.
In one embodiment, as shown in fig. 2, thefourth switching unit 121a, thefifth switching unit 121b, thesixth switching unit 122a, and theseventh switching unit 122b are NMOS switching transistors, where thefourth switching unit 121a is denoted by an NMOS transistor N3, thefifth switching unit 121b is denoted by an N4, thesixth switching unit 122a is denoted by an N5, and theseventh switching unit 122b is denoted by an N6.
In this embodiment, the first end of thefourth switch unit 121a is the drain of the NMOS transistor N3, the second end of thefourth switch unit 121a is the source of the NMOS transistor N3, the control end of thefourth switch unit 121a is the gate of the NMOS transistor N3, and the gate of the NMOS transistor N3 is electrically connected to the portgating control unit 130.
In this embodiment, the first end of thefifth switch unit 121b is the drain of the NMOS transistor N4, the second end of thefifth switch unit 121b is the source of the NMOS transistor N4, the control end of thefifth switch unit 121b is the gate of the NMOS transistor N4, and the gate of the NMOS transistor N4 is electrically connected to the portgating control unit 130.
In this embodiment, the first end of thesixth switch unit 122a is the source of the NMOS transistor N5, the second end of thesixth switch unit 122a is the drain of the NMOS transistor N5, the control end of thesixth switch unit 122a is the gate of the NMOS transistor N5, and the gate of the NMOS transistor N5 is electrically connected to the portgating control unit 130.
In this embodiment, the first end of theseventh switch unit 122b is the source of the NMOS transistor N6, the second end of theseventh switch unit 122b is the drain of the NMOS transistor N6, the control end of theseventh switch unit 122b is the gate of the NMOS transistor N6, and the gate of the NMOS transistor N6 is electrically connected to the portgating control unit 130.
For convenience of illustration, the connection between the gate of each switching tube and the portgating control unit 130 is not directly shown in fig. 2.
In this embodiment, the switching between the charging and discharging states of the second capacitor C2 is achieved by the cooperation of the switching transistors.
In another embodiment, as shown in fig. 2, a negative voltage divide-by-twoconversion circuit 100 is provided, the negative voltage divide-by-twoconversion circuit 100 includes: a basic negativepressure generating unit 110, a negative pressure dividing-by-two convertingunit 120, and a portgating control unit 130, the basic negativepressure generating unit 110 including a firstswitch switching unit 111, a first capacitor C1, and a first switch unit 112, the firstswitch switching unit 111 including: thesecond switch unit 113 and thethird switch unit 114, the first switch unit 112 adopts an NMOS tube N1, thesecond switch unit 113 adopts a PMOS tube P1, thethird switch unit 114 adopts an NMOS tube N2, the negative voltage divide-by-twoconversion unit 120 comprises asecond switch unit 121, a second capacitor C2 and athird switch unit 122, thesecond switch unit 121 comprises afourth switch unit 121a and afifth switch unit 121b, thethird switch unit 122 comprises asixth switch unit 122a and aseventh switch unit 122b, and thefourth switch unit 121a, thefifth switch unit 121b, thesixth switch unit 122a and theseventh switch unit 122b all adopt NMOS switch tubes.
The first group of gating control signals comprise a gate control signal of an NMOS tube N1, a gate control signal of a PMOS tube P1, a gate control signal of an NMOS tube N4 and a gate control signal of an NMOS tube N6, the gate control signal of the PMOS tube P1 is a low-level signal, the gate control signals of the NMOS tube N1, the NMOS tube N4 and the NMOS tube N6 are all high-level signals, at the moment, the NMOS tube N1, the NMOS tube N4 and the NMOS tube N6 work, the PMOS tube P1 works, and the rest switch tubes do not work.
The second group of gating control signals comprise gate control signals of the NMOS tube N2, gate control signals of the NMOS tube N3 and gate control signals of the NMOS tube N5, the gate control signals of the NMOS tube N2, the gate control signals of the NMOS tube N3 and the gate control signals of the NMOS tube N5 are all high-level signals, the NMOS tube N2, the NMOS tube N3 and the gate control signals of the NMOS tube N5 work at the moment, and the rest switch tubes do not work.
An apparatus terminal includes the above-described negative pressure divided-by-twoconversion circuit 100.
The division of the units in the negative pressure divided-by-twoconversion circuit 100 is only for illustration, and in other embodiments, the negative pressure divided-by-twoconversion circuit 100 may be divided into different units as needed to complete all or part of the functions of the negative pressure divided-by-twoconversion circuit 100. The specific limitation of the negative pressure divided-by-twoconversion circuit 100 can be referred to as the limitation of the method, and the description thereof is omitted herein.
That is, the foregoing embodiments are merely examples of the present application, and are not intended to limit the scope of the patent application, and all equivalent structures or equivalent processes using the descriptions and the drawings of the present application, such as combining technical features of the embodiments, or directly or indirectly using the embodiments in other related technical fields, are included in the scope of the patent protection of the present application.
In addition, the present application may use the same or different reference numerals for structural elements having the same or similar characteristics. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In this application, the term "for example" is used to mean "serving as an example, instance, or illustration. Any embodiment described herein as "for example" is not necessarily to be construed as preferred or advantageous over other embodiments. The previous description is provided to enable any person skilled in the art to make or use the present application. In the above description, various details are set forth for purposes of explanation.
It will be apparent to one of ordinary skill in the art that the present application may be practiced without these specific details. In other instances, well-known structures and processes have not been shown in detail to avoid unnecessarily obscuring the description of the present application. Thus, the present application is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.
Claims (8)
1. A negative pressure divided-by-two conversion circuit, comprising:
the base negative pressure generating unit is used for connecting input voltage during gating, the second end of the base negative pressure generating unit is used for being grounded during gating, only one end of the first end and the second end of the base negative pressure generating unit is gated at any moment, and the third end of the base negative pressure generating unit is used for being grounded during gating of the first end of the base negative pressure generating unit;
the negative pressure dividing and converting unit is characterized in that a first end of the negative pressure dividing and converting unit is used for being electrically connected with a fourth end of the basic negative pressure generating unit during gating, a second end of the negative pressure dividing and converting unit is used for outputting target negative pressure during gating, a third end of the negative pressure dividing and converting unit is used for outputting the target negative pressure during gating of the first end of the negative pressure dividing and converting unit, the fourth end of the negative pressure dividing and converting unit is used for being grounded during gating of the second end of the negative pressure dividing and converting unit, only one end of the first end and the second end of the negative pressure dividing and converting unit is gated at any moment, and the target negative pressure is half of the input voltage;
the port gating control unit is respectively and electrically connected with the control ends of the basic negative pressure generating unit and the negative pressure dividing and converting unit and is used for respectively outputting corresponding gating control signals to the basic negative pressure generating unit and the negative pressure dividing and converting unit;
according to a first group of gating control signals, a first end and a third end of the basic negative pressure generating unit are respectively gated and form a passage between two corresponding ports so as to charge the basic negative pressure generating unit, and a second end and a fourth end of the negative pressure dividing and converting unit are respectively gated and form a passage between two corresponding ports so as to discharge the negative pressure dividing and converting unit;
according to a second group of gating control signals, the second end, the fourth end, the first end and the third end of the basic negative pressure generating unit are respectively gated and sequentially connected into a passage, so that the basic negative pressure generating unit discharges and charges the negative pressure dividing and converting unit;
the basic negative pressure generating unit includes:
the first end of the first switch switching unit is used for switching in the input voltage when the switch is turned on, the second end of the first switch switching unit is used for grounding when the switch is turned on, and only one end of the first switch switching unit is turned on at any time;
the first end of the first capacitor is electrically connected with the third end of the first switch switching unit;
the first end of the first switch unit is electrically connected with the first capacitor, and the second end of the first switch unit is grounded;
the control ends of the first switch switching unit and the first switch unit are respectively and electrically connected with the port gating control unit;
the negative pressure divides two conversion units include:
the first end of the second switch switching unit is used for being electrically connected with the second end of the first capacitor when the gating is switched, and the second end of the second switch switching unit is used as a first voltage output end and outputs converted voltage when the gating is switched;
the first end of the second capacitor is electrically connected with the third end of the second switch switching unit;
the first end of the third switch switching unit is electrically connected with the second end of the second capacitor, the second end of the third switch switching unit is used as a second voltage output end and outputs converted voltage when the switch gating is switched, and the third end of the third switch switching unit is used for being grounded when the switch gating is switched;
the control ends of the second switch switching unit and the third switch switching unit are respectively and electrically connected with the port gating control unit;
when the first end of the first switch switching unit is switched and gated to be connected with the input voltage, the second end of the first switch switching unit is grounded, the first end of the first switch switching unit, the first capacitor and the second end of the first switch switching unit form a passage, the first capacitor is charged and stores energy until the voltages at two ends of the first capacitor are the same as the input voltage, the third end of the third switch switching unit is grounded, the second end of the second switch switching unit is gated and outputs the converted voltage, and the third end of the third switch switching unit, the second capacitor and the second end of the second switch switching unit form a passage so as to discharge the second capacitor;
when the second end of the first switch switching unit is grounded, the first end of the first switch switching unit and the second end of the first switch switching unit are disconnected, the first end of the second switch switching unit is gated and electrically connected with the second end of the first capacitor, the second end of the third switch switching unit is gated and outputs converted voltage, and the second end of the first switch switching unit, the first capacitor, the first end of the second switch switching unit, the second capacitor and the second end of the third switch switching unit form a passage to charge the second capacitor.
2. The negative-pressure divided-by-two conversion circuit according to claim 1, wherein the first switch switching unit includes:
the first end of the second switch unit is used for being connected with the input voltage, and the second end of the second switch unit is electrically connected with the first end of the first capacitor;
the first end of the third switch unit is electrically connected with the first end of the first capacitor, and the second end of the third switch unit is grounded;
and the control ends of the second switch unit and the third switch unit are respectively and electrically connected with the port gating control unit.
3. The negative pressure divided-by-two conversion circuit according to claim 1, wherein the first switching unit employs an NMOS transistor.
4. The negative pressure divided-by-two conversion circuit according to claim 2, wherein the second switching unit is a PMOS transistor, and the third switching unit is an NMOS transistor.
5. The negative-pressure divided-by-two conversion circuit according to claim 1, wherein the second switch switching unit includes:
the first end of the fourth switch unit is electrically connected with the fourth end of the basic negative pressure generating unit, and the second end of the fourth switch unit is electrically connected with the first end of the second capacitor;
the first end of the fifth switch unit is electrically connected with the first end of the second capacitor, and the second end of the fifth switch unit is used for outputting the target negative pressure when the corresponding switch is conducted;
and the control ends of the fourth switch unit and the fifth switch unit are respectively and electrically connected with the port gating control unit.
6. The negative-pressure divided-by-two conversion circuit according to claim 5, wherein the third switch switching unit includes:
the first end of the sixth switch unit is used for outputting the target negative pressure when the corresponding switch is conducted, and the second end of the sixth switch unit is used for being electrically connected with the second capacitor;
a seventh switch unit, wherein a first end of the seventh switch unit is electrically connected with the second capacitor, and a second end of the seventh switch unit is grounded;
and the control ends of the sixth switch unit and the seventh switch unit are respectively and electrically connected with the port gating control unit.
7. The negative-pressure divided-by-two conversion circuit according to claim 6, wherein the fourth switching unit, the fifth switching unit, the sixth switching unit, and the seventh switching unit each employ an NMOS switching tube.
8. A device terminal comprising the negative-pressure divided-by-two switching circuit according to any one of claims 1 to 7.
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| CN202310112881.5ACN115864830B (en) | 2023-02-15 | 2023-02-15 | Negative pressure divides two conversion circuit and equipment terminal |
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| CN202310112881.5ACN115864830B (en) | 2023-02-15 | 2023-02-15 | Negative pressure divides two conversion circuit and equipment terminal |
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| CN115864830A (en) | 2023-03-28 |
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