Source voltage control circuit and its working method, consumable chip and its working methodTechnical field
The present invention relates to consumable chips for electrical domain, more particularly, to a kind of source voltage control circuit of consumable chipAnd its working method.
Background technology
In the prior art, either print cartridge or cartridge are required for that one piece of consumptive material core is arranged in box portion outside printerPiece, consumable chip be capable of consumable items allowance in the source of electronical record consumption material box, ink color, box and date of manufacture etc. lettersBreath.In this way, the information of printing device electronics read on consumable chip, it will be able in time, automatically update printing imaging deviceState, the information such as type, the date of manufacture of consumption material box are manually inputted without client.
As shown in Figure 1, including substrate 10 and being arranged in upper multiple contacts 20 on consumable chip, electric contact 20 is as logicalThe probe for interrogating unit and printer connects, wherein part electric contact 20 is used to receive the power supply of printer offer and to electronic dieBlock 30 is powered；Remaining electric contact 20 is for transmitting information.Electronic module 30（Fig. 2 shows）It is also provided on the substrate 10, and is touched with electricity20 electrical connection of point.As shown in Fig. 2, electronic module 30 includes interface unit 31, reset unit 32, control unit 33 and memory34, interface unit 31 is connect with electric contact 20, for carrying out data exchange between printer control mainboard, and will be receivedIt is sent to control unit 33 after the processing such as signal is filtered, delay, control unit 33 is logic circuit or microcontroller,The access of 34 internal data of control memory.Present electronic module needs to handle data-signal, if voltage signal existsWhen rising edge or failing edge, operating voltage plays pendulum, and also results in the inaccuracy of signal processing.Also, eachFunction module has most suitable operating voltage, and the required supply voltage of different function modules is different.
Therefore, in order to ensure the job stability of chip and good reset, it is square wave generally to require power supply timing, butIt is to be influenced by energy storage filter capacitor on chip, the operating voltage that chip obtains, which is a rising edge and failing edge, slopeWaveform is not complete square wave.
Invention content
The main object of the present invention is to provide that a kind of stability is more preferable, source voltage control circuit simple in structure.
It is a further object of the present invention to provide the source voltage control circuits that a kind of voltage signal ensuring output is square waveWorking method.
It is a further object of the present invention to provide a kind of better consumable chip of stability and working methods.
Another object of the present invention is to provide stability higher working method when one kind makes consumable chip work.
To achieve the above object, source voltage control circuit provided by the invention includes controller and voltage reduction module, controlDevice processed receives supply voltage control signal, and when judging that power supply voltage signal rises or decrease beyond preset threshold value,Export skip signal, wherein skip signal is the voltage signal of preset voltage value.Voltage reduction module includes the decompression of multiple parallel connectionsCircuit, reduction voltage circuit include switching device and down block, wherein switching device be connected to voltage reduction module and power supply itBetween, the opening and closing of controller output control Signal-controlled switch device.
By said program as it can be seen that being carried out to the stage of the rising edge of power supply signal and failing edge by way of softwareReason so that the voltage signal of control circuit output is square wave, and structure is relatively easy, stability higher, and switching device is arranged,The switching device that selection is connected as needed, can generate different voltage values, to meet the demand of different operating voltages.
Further embodiment is that down block includes diode group, and the forward direction of the diode in diode group is connected.Preferably, switching device selection triode or field-effect tube.
By said program as it can be seen that using zener diode according to breakdown voltage come the characteristic of stepping, being connected can obtainObtain more burning voltages.
In order to realize that another object of the present invention, the present invention provide a kind of working method of source voltage control circuit,Wherein, source voltage control circuit includes controller and voltage reduction module, and voltage reduction module includes the reduction voltage circuit of multiple parallel connections, dropVolt circuit includes switching device and down block, and switching device is connected between power supply and down block.This method includes：
Controller receives power supply voltage signal, and whether be more than preset threshold value, such as if judging that power supply voltage signal rises or declinesBe, then within preset a period of time after power supply voltage signal rises or decrease beyond preset threshold value, output transition letterNumber, at this point, controller will export control signal to control the opening and closing of switching device to switching device.
It can be seen that controlling the opening and closing of switching device in a manner of given threshold controller, and then ensure that voltage is believedNumber during rising edge or the failing edge, once reach set threshold value, you can it is exported within the preset timeVoltage signal, stability is more preferable, and response is faster.
In order to realize another object of the present invention, the present invention provides a kind of consumable chip comprising substrate is set on substrateThere is source voltage control circuit, wherein source voltage control circuit includes controller and voltage reduction module, and controller receives power supplyVoltage control signal, and when judging that power supply voltage signal rises or decrease beyond preset threshold value, skip signal is exported,Skip signal is the voltage signal of preset voltage value.Voltage reduction module includes the reduction voltage circuit of multiple parallel connections, reduction voltage circuit packetSwitching device and down block are included, switching device is connected between voltage reduction module and power supply, controller output control signalControl the opening and closing of switching device.
It can be seen that being handled the rising edge and failing edge of power supply signal by controller so that control circuit is defeatedThe voltage signal gone out is square wave, and structure is relatively easy, the stability higher of chip processing data, more efficient.In addition, also setting upSwitching device, can generate different voltage values, to meet the demand of the different power voltage of chip.
In order to realize that another object of the present invention, the present invention provide a kind of working method of consumable chip, wherein consumptive material corePiece includes substrate, and substrate is equipped with source voltage control circuit, and source voltage control circuit includes controller and voltage reduction module,Voltage reduction module includes the reduction voltage circuit of multiple parallel connections, and reduction voltage circuit includes switching device and down block, switching device connectionBetween power supply and down block.This method includes：Controller receive power supply voltage signal, judge power supply voltage signal rise orWhether it is more than preset threshold value that person declines, if so, output jump signal, jump signal is the voltage letter of preset voltage valueNumber, at this point, controller will export the opening and closing of control Signal-controlled switch device to switching device.
It can be seen that it can be seen that control the opening and closing of switching device in a manner of given threshold controller, and then reallyVoltage signal is protected during rising or decline, once reaching set threshold value, you can output is set within a certain period of timeFixed voltage signal, and export signal be square wave so that the stability of chip is more preferable, work it is more efficient.
Description of the drawings
Fig. 1 is the structure chart of consumable chip.
Fig. 2 is the electric functional block diagram of the electronic module of consumable chip.
Fig. 3 is the electrical schematic diagram of source voltage control circuit of the present invention.
Fig. 4 is supply voltage V0, supply voltage V1, output voltage V2, output voltage V3 and the output voltage of the present inventionThe oscillogram of V4.
The invention will be further described with reference to the accompanying drawings and embodiments.
Specific implementation mode
As shown in figure 3, Fig. 3 is the electrical schematic diagram of source voltage control circuit of the present invention, the supply voltage in the present embodimentControl circuit includes controller 1 and voltage reduction module 2, wherein the control signal of the reception supply voltage of controller 1 V1, andJudge that supply voltage V1 signals rise or when decreaseing beyond preset threshold value, exports skip signal, skip signal i.e. pre-If voltage value voltage signal.The supply voltage V0 signals to chip of general printer are square wave, but by being stored up on chipThe influence of energy filter capacitor, the supply voltage V1 signals that chip obtains are the waveform that a rising edge and failing edge have slope,It is not complete square wave.
Voltage reduction module 2 includes the reduction voltage circuit of multiple parallel connections.In the present embodiment, voltage reduction module 2 includes that decompression in parallel is electricRoad 3, reduction voltage circuit 4, reduction voltage circuit 5 and reduction voltage circuit 6, wherein reduction voltage circuit 3 includes switching device 31, switching device 31It is connected between voltage reduction module 2 and power supply, and switching device 31 is opened and closed under the control signal of controller 1, it is preferred that openIt closes device 31 and selects diode or field-effect tube.
Reduction voltage circuit 4 includes switching device 41 and down block 42, and switching device 41 is connected to voltage reduction module 2 and electricityBetween source, and switching device 41 is opened and closed under the control signal of controller 1.Reduction voltage circuit 5 includes switching device 51 and dropComponent 52 is pressed, switching device 51 is connected between voltage reduction module 2 and power supply, and switching device 51 is in the control of controller 1It is opened and closed under signal.Likewise, reduction voltage circuit 6 includes switching device 61 and down block 62, switching device 61 is connected to decompressionBetween module 2 and power supply, and switching device 61 is opened and closed under the control signal of controller 1.
In the present embodiment, down block 42 includes diode group 421, and diode group 421 includes diode 4211.Equally, down block 52 includes diode group 521, and the forward direction of the diode 5211 in diode group 521 is connected, down block 62The positive series connection of diode 6211 including diode group 621, and in diode group 621.In this way, using diode according to breakdownVoltage carrys out the characteristic of stepping, and more burning voltages can be obtained by being connected.
In the present embodiment, when controller 1 judges that supply voltage V1 signals rise or decrease beyond preset threshold value, andAnd preset a period of time after supply voltage V1 signals rise or decrease beyond preset threshold value, after 2 milliseconds, outputJump signal, that is, the voltage signal of preset output voltage is exported, at this point, controller 1 will export control signal controlThe opening and closing of switching device 41, switching device 51 and switching device 61.
It is supply voltage V1, output voltage V2, output voltage V3 and the output voltage V4 of the present invention referring to Fig. 4, Fig. 4Oscillogram, the exportable different voltages value of controller 1 in various embodiments, for example, changing preset threshold value and switchThe time of device opening and closing, the voltage value of output end will change.
The step of output end output voltage V2 is in one embodiment：After powering on voltage when t1, controller 1 controlsSwitching device 31, switching device 41, switching device 51 and switching device 61 keep all off state, until supply voltageWhen being increased beyond t1 after 1 preset threshold value of controller of V2 signals, the output control Signal-controlled switch of controller 1 device 31 connectLogical, when t5 after the threshold value of supply voltage V2 signals dropped to set by controller 1, controller controls the disconnection of switch 31,It can be obtained waveform output voltage V2 as shown in Figure 4.
The step of output end output voltage V3 is in another embodiment：After powering on voltage when t1, controller 1 controlsSwitching device 31, switching device 41, switching device 51 and switching device 61 keep all off state, until supply voltageThe rising of V2 signals reach controller 1 terminate when t2 after set threshold value, at this point, the output control signal control of controller 1Switching device 41 is connected, and output voltage is the voltage value at 421 both ends of diode group at this time, when the decline of supply voltage V2 signalsAfter to the threshold value set by controller 1 in preset time t6, switching device 41 is disconnected, you can it is as shown in Figure 4 to obtain waveformVoltage V3.
The step of output end output voltage V4 is in another embodiment：After powering on voltage when t1, controller 1 controlsSwitching device 31, switching device 41, switching device 51 and switching device 61 keep all off state, until supply voltageTerminate when t2 after the threshold value of V2 signals risen to set by controller 1, at this point, the output control Signal-controlled switch of controller 1Device 62 is connected, and output voltage V4 is equal to the voltage at 621 both ends of diode group, and when t3, controller 1 controls switching device 61 and disconnectsAnd switching device 51 is closed, at this point, output voltage V4 is equal to the voltage at 521 both ends of diode group, when t4, controller control is openedIt closes the disconnection of device 51 and switching device 61 is closed, at this point, output voltage V4 is equal to the terminal voltage of diode group 621, until t5Moment terminates, you can obtains waveform output voltage V4 as shown in Figure 4.
Certainly, above-described embodiment is only the preferred embodiment of the present invention, and when practical application, the present invention also more changesBecome, for example, the threshold value of the default voltage signal of controller is different, the waveform of obtained voltage signal is also different.It is suchObvious equivalence changes also should include within the scope of the invention as claimed.