CN111526641B - Back pressure self-adjusting method and device - Google Patents
Back pressure self-adjusting method and deviceDownload PDFInfo
- Publication number
- CN111526641B CN111526641BCN202010414300.XACN202010414300ACN111526641BCN 111526641 BCN111526641 BCN 111526641BCN 202010414300 ACN202010414300 ACN 202010414300ACN 111526641 BCN111526641 BCN 111526641B
- Authority
- CN
- China
- Prior art keywords
- voltage
- sampling
- feedback
- error
- resistor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034methodMethods0.000titleclaimsabstractdescription19
- 238000005070samplingMethods0.000claimsabstractdescription60
- 239000011324beadSubstances0.000claimsabstractdescription18
- 238000006243chemical reactionMethods0.000claimsdescription4
- 230000003321amplificationEffects0.000description4
- 238000010586diagramMethods0.000description4
- 238000003199nucleic acid amplification methodMethods0.000description4
- 230000007423decreaseEffects0.000description2
- 230000003071parasitic effectEffects0.000description2
- 230000000694effectsEffects0.000description1
- 238000005516engineering processMethods0.000description1
- 238000004519manufacturing processMethods0.000description1
- 230000004048modificationEffects0.000description1
- 238000012986modificationMethods0.000description1
- 230000003287optical effectEffects0.000description1
Images
Classifications
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
Description
Technical Field
The present disclosure relates to the field of LED technologies, and in particular, to a method and an apparatus for back pressure self-adjustment.
Background
In the LED display screen, when LED output channel closed, because of parasitic inductance's afterflow effect, can continuously charge the parasitic capacitance of passageway department, form very high voltage burr, form the reverse voltage of loading on the lamp pearl with the tubulation output this moment, the back pressure is too big to lead to the lamp pearl to be punctured the production caterpillar phenomenon by the reverse direction, and the back pressure problem of display screen has not obtained proper solution always, only can reduce the back pressure phenomenon through artificial debugging at present.
Disclosure of Invention
The back pressure self-adjusting method and the back pressure self-adjusting device have the advantages that the back pressure of the display screen is controlled through the single chip microcomputer and the feedback circuit, automatic real-time adjustment of the back pressure is achieved, the caterpillar phenomenon of the display screen is avoided, and the user experience of the display screen is improved.
The technical scheme adopted for solving the technical problems is as follows:
according to one aspect herein, there is provided a method of back pressure self-regulation, comprising:
collecting voltages at two ends of a lamp bead as sampling voltages;
judging whether the sampling voltage is not less than a preset reference voltage or not;
if yes, obtaining a feedback voltage according to the sampling voltage and the reference voltage;
and adjusting the voltage at the two ends of the lamp bead through the feedback voltage.
Optionally, the obtaining a feedback voltage according to the sampling voltage and the reference voltage includes:
comparing the sampling voltage with the reference voltage to obtain an error voltage;
amplifying the error voltage to obtain an output voltage;
and converting the output voltage into a feedback voltage through a voltage series negative feedback circuit.
Optionally, the obtaining a feedback voltage according to the sampling voltage and the reference voltage includes:
circularly comparing the sampling voltage with the reference voltage through a single chip microcomputer;
when the sampling voltage is not less than a preset reference voltage, taking the difference value of the sampling voltage and the reference voltage as an error voltage;
amplifying the error voltage through an error amplifying circuit to obtain an output voltage;
and converting the output voltage into a feedback voltage through a voltage series negative feedback circuit.
Optionally, the error amplifying circuit includes: the amplifier comprises an amplifier A, a resistor R1 and a resistor R2, wherein the inverting input end of the amplifier A is connected with one end of a resistor R1 and one end of a resistor R2, the output end of the amplifier A is connected with the other end of a resistor R2, and the other end of the resistor R1 is grounded.
Optionally, the preset reference voltage is 1.5V.
According to another aspect of the present invention, there is provided a back pressure self-adjusting apparatus including:
the acquisition module is used for acquiring the voltages at two ends of the lamp bead as sampling voltages;
the judging module is used for judging whether the sampling voltage is not less than a preset reference voltage or not;
the feedback module is used for acquiring feedback voltage according to the sampling voltage and the reference voltage when the sampling voltage is not less than the preset reference voltage;
and the adjusting module is used for adjusting the voltages at the two ends of the lamp bead through the feedback voltage.
Optionally, the feedback module comprises:
the first comparison unit is used for comparing the sampling voltage with the reference voltage to obtain an error voltage;
the first amplifying unit is used for amplifying the error voltage to obtain an output voltage;
and the first conversion unit is used for converting the output voltage into a feedback voltage through a voltage series negative feedback circuit.
Optionally, the feedback module comprises:
the second comparison unit is used for circularly comparing the sampling voltage with the reference voltage through a single chip microcomputer;
the error unit is used for taking the difference value between the sampling voltage and the reference voltage as an error voltage when the sampling voltage is not less than the preset reference voltage;
the second amplifying unit is used for amplifying the error voltage through an error amplifying circuit to obtain an output voltage;
and the second conversion unit is used for converting the output voltage into the feedback voltage through the voltage series negative feedback circuit.
Optionally, the error amplifying circuit includes: the amplifier comprises an amplifier A, a resistor R1 and a resistor R2, wherein the inverting input end of the amplifier A is connected with one end of a resistor R1 and one end of a resistor R2, the output end of the amplifier A is connected with the other end of a resistor R2, and the other end of the resistor R1 is grounded.
Optionally, the preset reference voltage is 1.5V.
The embodiment of the invention provides a back pressure self-adjusting method and a back pressure self-adjusting device, wherein the method comprises the following steps: collecting voltages at two ends of a lamp bead as sampling voltages; judging whether the sampling voltage is not less than a preset reference voltage or not; if yes, obtaining a feedback voltage according to the sampling voltage and the reference voltage; adjusting the voltage at two ends of the lamp bead through the feedback voltage; the back pressure of the display screen is controlled through the single chip microcomputer and the feedback circuit, so that the automatic real-time adjustment of the back pressure is realized, the caterpillar phenomenon of the display screen is solved, and the user experience of the display screen is improved.
Drawings
Fig. 1 is a flowchart of a method for back pressure self-adjustment according to an embodiment of the present invention;
FIG. 2 is a flowchart of a method of step S30 in FIG. 1;
FIG. 3 is a flowchart of another method of step S30 of FIG. 1;
fig. 4 is a circuit diagram of an error amplifying circuit according to an embodiment of the present invention;
fig. 5 is a block diagram illustrating an exemplary structure of a back pressure self-adjusting device according to a second embodiment of the present invention;
FIG. 6 is a block diagram illustrating an exemplary structure of the feedback module of FIG. 5;
fig. 7 is a block diagram of another exemplary structure of the feedback module of fig. 5.
The objects, features, and advantages described herein will be further explained with reference to the accompanying drawings.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer and more obvious, the present invention is further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not restrictive.
Example one
As shown in fig. 1, in this embodiment, a back pressure self-adjusting method includes:
s10, collecting voltages at two ends of the lamp bead as sampling voltages;
s20, judging whether the sampling voltage is not less than a preset reference voltage; if not, S21, the back pressure is proper;
if yes, S30, obtaining a feedback voltage according to the sampling voltage and the reference voltage;
and S40, adjusting the voltage at the two ends of the lamp bead through the feedback voltage.
In this embodiment, the back pressure of the display screen is controlled through the single chip microcomputer and the feedback circuit, so that the automatic real-time adjustment of the back pressure is realized, the caterpillar phenomenon of the display screen is solved, and the user experience of the display screen is improved.
In this embodiment, the voltage at the two ends of the lamp bead is sampled through the I/O port of the single chip microcomputer to serve as a sampling voltage, if the sampling voltage is smaller than the reference voltage by 1.5V, the back pressure is proper, and otherwise, the back pressure needs to be adjusted.
As shown in fig. 2, in the present embodiment, the step S30 includes:
s31, comparing the sampling voltage with the reference voltage to obtain an error voltage;
s32, amplifying the error voltage to obtain an output voltage;
and S33, converting the output voltage into a feedback voltage through a voltage series negative feedback circuit.
As another embodiment, as shown in fig. 3, the step S30 further includes:
s301, circularly comparing the sampling voltage with the reference voltage through a single chip microcomputer;
s302, when the sampling voltage is not less than a preset reference voltage, taking the difference value between the sampling voltage and the reference voltage as an error voltage;
s303, amplifying the error voltage through an error amplifying circuit to obtain an output voltage;
and S304, converting the output voltage into a feedback voltage through a voltage series negative feedback circuit.
As shown in fig. 4, in the present embodiment, the error amplification circuit includes: the amplifier comprises an amplifier A, a resistor R1 and a resistor R2, wherein the inverting input end of the amplifier A is connected with one end of a resistor R1 and one end of a resistor R2, the output end of the amplifier A is connected with the other end of a resistor R2, and the other end of the resistor R1 is grounded.
In this embodiment, UI is an input voltage of the amplifier, i.e., a sampling voltage, UD is a net input amount, and is a voltage value obtained by subtracting UI from a reference voltage, UD is UP-UN, where UP is a forward input voltage of the amplifier, UN is a reverse input voltage, and is subjected to error amplification by the amplifier to obtain an output voltage U0, and U0 is fed back through a feedback loop, where the feedback formula is as follows:
UF＝R1/(R1+R2)U0
as U0 increases, feedback voltage UF also increases, UN increases, and UD decreases.
In this embodiment, the preset reference voltage is 1.5V.
Example two
As shown in fig. 5, in the present embodiment, a back pressure self-adjusting apparatus includes:
theacquisition module 10 is used for acquiring voltages at two ends of the lamp bead as sampling voltages;
the judgingmodule 20 is configured to judge whether the sampling voltage is not less than a preset reference voltage;
thefeedback module 30 is configured to obtain a feedback voltage according to the sampling voltage and a preset reference voltage when the sampling voltage is not less than the preset reference voltage;
and the adjustingmodule 40 is used for adjusting the voltage at the two ends of the lamp bead through the feedback voltage.
In this embodiment, the back pressure of the display screen is controlled through the single chip microcomputer and the feedback circuit, so that the automatic real-time adjustment of the back pressure is realized, the caterpillar phenomenon of the display screen is solved, and the user experience of the display screen is improved.
In this embodiment, the voltage at the two ends of the lamp bead is sampled through the I/O port of the single chip microcomputer to be used as sampling voltage, if the sampling voltage is smaller than the reference voltage by 1.5V, the back pressure is proper, otherwise, the back pressure needs to be adjusted.
As shown in fig. 6, in this embodiment, the feedback module includes:
a first comparingunit 31 for comparing the sampling voltage with the reference voltage to obtain an error voltage;
afirst amplifying unit 32, configured to amplify the error voltage to obtain an output voltage;
a first convertingunit 33, configured to convert the output voltage into a feedback voltage through a voltage series negative feedback circuit.
As another embodiment, as shown in fig. 7, the feedback module may further include:
thesecond comparison unit 301 is configured to compare the sampled voltage with the reference voltage cyclically by using a single chip microcomputer;
anerror unit 302, configured to, when the sampling voltage is not less than a preset reference voltage, take a difference between the sampling voltage and the reference voltage as an error voltage;
asecond amplifying unit 303, configured to amplify the error voltage by an error amplifying circuit to obtain an output voltage;
a second convertingunit 304, configured to convert the output voltage into a feedback voltage through a voltage series negative feedback circuit.
As shown in fig. 4, in the present embodiment, the error amplification circuit includes: the amplifier comprises an amplifier A, a resistor R1 and a resistor R2, wherein the inverting input end of the amplifier A is connected with one end of a resistor R1 and one end of a resistor R2, the output end of the amplifier A is connected with the other end of a resistor R2, and the other end of the resistor R1 is grounded.
In this embodiment, UI is an input voltage of the amplifier, i.e., a sampling voltage, UD is a net input amount, and is a voltage value obtained by subtracting UI from a reference voltage, UD is UP-UN, where UP is a forward input voltage of the amplifier, UN is a reverse input voltage, and is subjected to error amplification by the amplifier to obtain an output voltage U0, and U0 is fed back through a feedback loop, where the feedback formula is as follows:
UF＝R1/(R1+R2)U0
as U0 increases, feedback voltage UF also increases, UN increases, and UD decreases.
In this embodiment, the preset reference voltage is 1.5V.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better embodiment. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The preferred embodiments of the present invention have been described above with reference to the accompanying drawings, and are not to be construed as limiting the scope of the invention. Any modification, equivalent replacement, and improvement made by those skilled in the art without departing from the scope and spirit of the present invention should be within the scope of the claims of the present invention.
Claims (8)
1. A method of backpressure self-regulation, comprising:
collecting voltages at two ends of a lamp bead as sampling voltages;
judging whether the sampling voltage is not less than a preset reference voltage or not; if not, the back pressure is appropriate;
if yes, obtaining a feedback voltage according to the sampling voltage and the reference voltage;
adjusting the voltage at two ends of the lamp bead through the feedback voltage;
wherein the obtaining a feedback voltage according to the sampling voltage and the reference voltage comprises:
comparing the sampling voltage with the reference voltage to obtain an error voltage;
amplifying the error voltage to obtain an output voltage;
and converting the output voltage into a feedback voltage through a voltage series negative feedback circuit.
2. The method of claim 1, wherein obtaining the feedback voltage according to the sampling voltage and the reference voltage comprises:
circularly comparing the sampling voltage with the reference voltage through a single chip microcomputer;
when the sampling voltage is not less than a preset reference voltage, taking the difference value of the sampling voltage and the reference voltage as an error voltage;
amplifying the error voltage through an error amplifying circuit to obtain an output voltage;
and converting the output voltage into a feedback voltage through a voltage series negative feedback circuit.
3. The method of claim 2, wherein the error amplifier circuit comprises: the amplifier comprises an amplifier A, a resistor R1 and a resistor R2, wherein the inverting input end of the amplifier A is connected with one end of a resistor R1 and one end of a resistor R2, the output end of the amplifier A is connected with the other end of a resistor R2, and the other end of the resistor R1 is grounded.
4. The method of claim 1, wherein the predetermined reference voltage is 1.5V.
5. A back pressure self-regulating apparatus, comprising:
the acquisition module is used for acquiring the voltages at two ends of the lamp bead as sampling voltages;
the judging module is used for judging whether the sampling voltage is not less than a preset reference voltage or not; if not, the back pressure is appropriate;
the feedback module is used for acquiring feedback voltage according to the sampling voltage and the reference voltage when the sampling voltage is not less than the preset reference voltage;
the adjusting module is used for adjusting the voltage at the two ends of the lamp bead through the feedback voltage;
wherein the feedback module comprises:
the first comparison unit is used for comparing the sampling voltage with the reference voltage to obtain an error voltage;
the first amplifying unit is used for amplifying the error voltage to obtain an output voltage;
and the first conversion unit is used for converting the output voltage into a feedback voltage through a voltage series negative feedback circuit.
6. The backpressure self-regulating device of claim 5, wherein the feedback module comprises:
the second comparison unit is used for circularly comparing the sampling voltage with the reference voltage through a single chip microcomputer;
the error unit is used for taking the difference value between the sampling voltage and the reference voltage as an error voltage when the sampling voltage is not less than the preset reference voltage;
the second amplifying unit is used for amplifying the error voltage through an error amplifying circuit to obtain an output voltage;
and the second conversion unit is used for converting the output voltage into the feedback voltage through the voltage series negative feedback circuit.
7. The back pressure self-adjusting device according to claim 6, wherein the error amplifying circuit comprises: the amplifier comprises an amplifier A, a resistor R1 and a resistor R2, wherein the inverting input end of the amplifier A is connected with one end of a resistor R1 and one end of a resistor R2, the output end of the amplifier A is connected with the other end of a resistor R2, and the other end of the resistor R1 is grounded.
8. The device of claim 5, wherein the predetermined reference voltage is 1.5V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010414300.XACN111526641B (en) | 2020-05-15 | 2020-05-15 | Back pressure self-adjusting method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010414300.XACN111526641B (en) | 2020-05-15 | 2020-05-15 | Back pressure self-adjusting method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111526641A CN111526641A (en) | 2020-08-11 |
| CN111526641Btrue CN111526641B (en) | 2022-06-10 |
Family
ID=71907549
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010414300.XAActiveCN111526641B (en) | 2020-05-15 | 2020-05-15 | Back pressure self-adjusting method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111526641B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115294928B (en)* | 2022-10-08 | 2022-12-27 | 成都利普芯微电子有限公司 | Shadow elimination circuit, line driving circuit and display screen |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008197517A (en)* | 2007-02-15 | 2008-08-28 | Sony Corp | Pixel circuit, display device, and manufacturing method of display device |
| CN102842279A (en)* | 2012-08-17 | 2012-12-26 | 上海华兴数字科技有限公司 | Display screen and backlight drive method thereof |
| CN105741797A (en)* | 2014-12-24 | 2016-07-06 | 乐金显示有限公司 | Liquid crystal display and driving method thereof |
| CN210072040U (en)* | 2019-05-30 | 2020-02-14 | 深圳市富满电子集团股份有限公司 | LED display screen open circuit detection system |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2576778C (en)* | 2006-02-07 | 2014-09-02 | Xinping Huang | Self-calibrating multi-port circuit and method |
| CN201360365Y (en)* | 2009-02-26 | 2009-12-09 | 青岛海信电器股份有限公司 | Power supply control circuit and projector scope with the circuit |
| KR101121956B1 (en)* | 2010-04-29 | 2012-03-09 | 주식회사 실리콘웍스 | Driver IC for electrical road and driving method thereof |
| CN104768303B (en)* | 2015-04-20 | 2018-01-26 | 上海晶丰明源半导体股份有限公司 | LED drive control circuits |
| CN108093530B (en)* | 2016-04-29 | 2020-03-06 | 矽力杰半导体技术(杭州)有限公司 | Control circuit, control method and linear LED drive circuit applying same |
| CN109274261A (en)* | 2018-11-30 | 2019-01-25 | 中国电子科技集团公司第四十三研究所 | Non-isolated negative pressure output control circuit and control method |
| CN109618463B (en)* | 2019-01-07 | 2021-03-02 | 福州大学 | LED driving power supply dimming method without electrolytic capacitor |
- 2020
- 2020-05-15CNCN202010414300.XApatent/CN111526641B/enactiveActive
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008197517A (en)* | 2007-02-15 | 2008-08-28 | Sony Corp | Pixel circuit, display device, and manufacturing method of display device |
| CN102842279A (en)* | 2012-08-17 | 2012-12-26 | 上海华兴数字科技有限公司 | Display screen and backlight drive method thereof |
| CN105741797A (en)* | 2014-12-24 | 2016-07-06 | 乐金显示有限公司 | Liquid crystal display and driving method thereof |
| CN210072040U (en)* | 2019-05-30 | 2020-02-14 | 深圳市富满电子集团股份有限公司 | LED display screen open circuit detection system |
Non-Patent Citations (2)
| Title |
|---|
| Ying-Yun Chen.Research of an Intelligent Auto-Controlling System for LCD Screen Flicker.《Journal of Display Technology》.2015,(第6（2016）期),* |
| 王顶.小点间距LED显示屏驱动芯片的研究.《中国优秀硕士论文电子期刊网》.2017,* |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111526641A (en) | 2020-08-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107546981B (en) | A kind of power circuit | |
| CN113037222B (en) | Bias circuit and amplifier | |
| CN110855254A (en) | Radio frequency power amplifier, chip and communication terminal | |
| CN103457673B (en) | Improve the method and apparatus of APD optical receiver saturated light power | |
| CN106886243B (en) | A kind of low pressure difference linear voltage regulator with fast response characteristic | |
| CN104777869B (en) | A kind of low pressure difference linear voltage regulator of the quickly response of dynamic adjustment reference voltage | |
| US10862432B2 (en) | Power control circuit and power amplifier circuit | |
| US8587380B2 (en) | Saturation protection of a regulated voltage | |
| CN111526641B (en) | Back pressure self-adjusting method and device | |
| CN101739051A (en) | Dynamic resistance-capacitance compensating device for bipolar low-pressure difference linear voltage regulator | |
| CN107102666A (en) | Low pressure difference linear voltage regulator | |
| CN102811454B (en) | A kind of method of testing, Apparatus and system of mobile terminal sensitivity | |
| CN203339951U (en) | A non-isolated DC/DC low standby power consumption circuit | |
| CN111030604B (en) | Method and device for controlling DCDC converter, storage medium and electronic equipment | |
| CN207677733U (en) | A power synchronization monitoring system based on OTN transmission network | |
| CN102097129B (en) | The erasing voltage rise control circuit of flash memory | |
| CN104484006A (en) | Voltage stabilizing circuit and display device | |
| CN114205393A (en) | Data reporting method and system of intelligent home system | |
| CN108449062A (en) | Control devices for electronic products | |
| CN111740606A (en) | Circuit control device and circuit control method | |
| CN204993955U (en) | A continuous light source light energy detection system | |
| CN204465462U (en) | A power control device for mobile terminal power amplifier | |
| CN111431546B (en) | Digital microwave signal anti-distortion circuit | |
| CN110517464B (en) | Calling device is regularly reminded to clinical nurse | |
| CN115346461A (en) | Public voltage compensation method, device, display device and readable storage medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |