CN103929861A - Novel soft start circuit in LED driver - Google Patents
Novel soft start circuit in LED driver Download PDFInfo
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- CN103929861A CN103929861A CN201410176530.1A CN201410176530A CN103929861A CN 103929861 A CN103929861 A CN 103929861A CN 201410176530 A CN201410176530 A CN 201410176530A CN 103929861 A CN103929861 A CN 103929861A
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- 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
Abstract
The invention relates to a soft start circuit, in particular to a novel soft start circuit in an LED driver. According to the circuit, a switch control module controls a resistance voltage distribution module to enable the output voltage to be increased gradually to a needed value by changing total resistance, a timing control module controls the time for switching-on and switching-off of the switch control module, a current bias module provides bias currents for the whole soft start circuit, and an enable control module enables the current bias module and the timing control module when the soft start circuit works and disenables the current bias module and the timing control module otherwise. The soft start circuit has the advantages of being simple in structure, high in reliability, low in power consumption and the like.
Description
Technical field
The present invention relates to a kind of soft starting circuit, particularly the novel soft starting circuit in a kind of LED driving.
Background technology
LED drives the problem that can produce output overshoot and occur surge current in start-up course, may produce damage to electronic system, even cause brokenly ring. in order to eliminate output overshoot and surge current, need to design soft starting circuit, make enough length start-up time, start-up course enough slowly.
Traditional soft starting circuit is, by constant-current source, electric capacity is charged to produce timing, and limited the duty ratio of inductive current or switch by the voltage on electric capacity, in order to ensure that start-up course is enough slow, need minimum charging current or very large electric capacity. for the consideration of the factors such as technique, charging current is difficult to accomplish very little, and larger electric capacity is difficult to realize in sheet. under normal circumstances, can realize by the method for external capacitor, but this has increased again the complexity of periphery circuit design, so be worthless. in addition, the power consumption of whole circuit is also larger, the enforcement of unfavorable low-power consumption.
Summary of the invention
The problem existing for background technology, the invention provides the novel soft starting circuit in a kind of LED driving.
For achieving the above object, technical scheme of the present invention is:
A novel soft starting circuit during LED drives, is characterized in that, comprising:
One current offset module: for whole soft starting circuit provides bias current;
One electric resistance partial pressure module: for output voltage provides biasing;
One switch control module: controlling resistance size;
One time delay control module: control switch control circuit is opened and the turn-off time, this time delay control module comprises first, second, third and fourth time delay module connecting successively;
One makes energy control module: enable current biasing circuit and delay control circuit;
Wherein, make the outside enable signal PD of input termination of energy control module, make the Enable Pin of energy control module EN output termination time delay control module, the Enable Pin of PDN output termination current offset module; The input termination foreign current IBIAS of current offset module, the output signal Ibias[3:0 of current offset module] difference access delay control module; The input of the output termination switch control module of time delay control module, the resistance value control end of the output connecting resistance division module of switch control module, the benchmark termination external reference voltage VB1 of electric resistance partial pressure module.
Novel soft starting circuit in above-mentioned a kind of LED drives, described current offset module comprises P type metal-oxide-semiconductor PM1-PM6; Wherein, the source electrode of PM1-PM6 is connected with supply voltage VDD; The grid of PM1-PM5 is connected with IBIAS, and the grid of PM6 makes energy control module PDN output with connecing; The drain electrode of PM1 and PM6 meets IBIAS, the drain electrode of PM2 is connected with the Ibias input of the first time delay module, the drain electrode of PM3 is connected with the Ibias input of the second time delay module, the drain electrode of PM4 is connected with the Ibias input of the 3rd time delay module, and the drain electrode of PM5 is connected with the Ibias input of the 4th time delay module.
Novel soft starting circuit in above-mentioned a kind of LED drives, described resistor voltage divider circuit comprises operational amplifier, N-type metal-oxide-semiconductor NMt and resistance R 1-R5; Wherein, the positive input terminal of operational amplifier is connected with reference voltage V B1, and negative input end is connected with the source electrode of NMt, and output is connected with the grid of NMt; Drain electrode, grid and the source electrode of NMt is connected with resistance R 1 with the output of power vd D, operational amplifier respectively; Resistance R 1-R5 connects successively, one end ground connection GND of R5, and wherein one end of R1 and the negative input end of operational amplifier are connected, and the common port of R1 and R2 is the output of soft starting circuit.
Novel soft starting circuit in above-mentioned a kind of LED drives, described ON-OFF control circuit comprises N-type metal-oxide-semiconductor NM1-NM4; Wherein, the drain electrode connecting resistance R1 of NM1, the common port of R2, grid connects the Out output of the first time delay module; The drain electrode connecting resistance R2 of NM2, the common port of R3, grid connects the Out output of the second time delay module; The drain electrode connecting resistance R3 of NM3, the common port of R4, grid connects the Out output of the 3rd time delay module; The drain electrode connecting resistance R4 of NM4, the common port of R5, grid connects the Out output of the 4th time delay module; The source electrode of NM1, NM2, NM3, NM4 is unified ground connection GND.
Novel soft starting circuit in above-mentioned a kind of LED drives, in described time delay control module, the Rset end ground connection GND of the first time delay module, the Out output of Rset termination first time delay module of the second time delay module, the Out output of Rset termination second time delay module of the 3rd time delay module, the Out output of Rset termination the 3rd time delay module of the 4th time delay module; The Enable Pin of first, second, third and fourth time delay module connects the EN output that makes energy control module simultaneously.
Novel soft starting circuit in above-mentioned a kind of LED drives, described first, second, third and fourth time delay module includes P type metal-oxide-semiconductor PM7-PM12, N-type metal-oxide-semiconductor NM5-NM13, or door OR1, inverter INV1 and capacitor C 1; Wherein: the source electrode of NM5-NM10, NM12, NM13 is ground connection simultaneously, and the source electrode of PM7-PM12 meets power vd D; The grid of NM5, NM7, NM8, NM12 is connected with the drain electrode of NM6, NM5 as time delay module Ibias input; The grid of NM6, NM9, NM13 connects after being connected or the output of door OR1; The drain electrode of NM7 connects the drain electrode of PM7, and the drain electrode of NM8 connects the drain electrode of PM8, and the drain electrode of NM9 connects the drain electrode of PM9 and the grid of NM11, the grid of NM11 connect capacitor C 1 one end, the other end ground connection of C1; The drain electrode of NM11 connects the drain electrode of PM10, and the source electrode of NM11 connects the drain electrode of NM10, and the grid of NM10 connects the drain electrode of NM10; The grid of PM7 is connected with drain electrode, and the grid of PM8 is connected with drain electrode, and the grid of PM9 connects the grid of PM8; The grid of PM10 connects the grid of PM7, and the drain electrode of PM10 connects the drain electrode of PM11 and the grid of PM12, and the grid of PM11 connects the output of not gate INV1; The drain electrode of PM12 connects the drain electrode of NM12 and the drain electrode of NM13, and the drain electrode of NM12, NM13 is the Out output of time delay module; Or the input of door OR1 is respectively EN, the Rset input of time delay module, the input of the output termination INV1 of OR1.Time delay module can be exported unlatching or the shutoff of corresponding MOS switch in time delayed signal control switch control circuit.
Novel soft starting circuit in above-mentioned a kind of LED drives, described in make energy control module comprise inverter INV2 and INV3; The wherein outside enable signal PD of the input termination of inverter INV2, even the PDN output of INV2 output energy control module, PDN connects the input of INV3; The output of the input termination INV2 of INV3, the output of INV3 is the EN output of time delay control module.Make energy control module can enable current offset module and time delay control module.
Therefore, it is short that the present invention has start-up time, simple in structure, the advantage that stability is strong and low in energy consumption.
Brief description of the drawings
Figure 1 shows that the functional block diagram of novel soft starting circuit in a kind of LED driving.
Figure 2 shows that the circuit diagram of the novel soft starting circuit in LED driving.
Figure 3 shows that time delay module circuit diagram.
Figure 4 shows that and make energy control module circuit diagram.
Embodiment
For more well-known explanation the object, technical solutions and advantages of the present invention, below in conjunction with drawings and Examples, the present invention is further detailed.
As shown in Figure 1, be included as whole soft starting circuit provides the current offset module of bias current, opens and the time delay control module of turn-off time for output voltage provides switch control module, the control switch control module of electric resistance partial pressure module, the controlling resistance size of biasing functional block diagram of the present invention; Wherein, make the outside enable signal PD of input termination of energy control module, make the Enable Pin of energy control module EN output termination time delay control module, the Enable Pin of PDN output termination current offset module; The input termination foreign current IBIAS of current offset module, the output signal Ibias[3:0 of current offset module] difference access delay control module; The input of the output termination switch control module of time delay control module, the resistance value control end of the output connecting resistance division module of switch control module, the benchmark termination external reference voltage VB1 of electric resistance partial pressure module.
The circuit diagram that Figure 2 shows that the novel soft starting circuit in a kind of LED driving, described current offset module comprises P type metal-oxide-semiconductor PM1-PM6; Wherein, the source electrode of PM1-PM6 is connected with supply voltage VDD; The grid of PM1-PM5 is connected with IBIAS, and the grid of PM6 makes energy control module PDN output with connecing; The drain electrode of PM1 and PM6 meets IBIAS, the drain electrode of PM2 is connected with the Ibias input of the first time delay module, the drain electrode of PM3 is connected with the Ibias input of the second time delay module, the drain electrode of PM4 is connected with the Ibias input of the 3rd time delay module, and the drain electrode of PM5 is connected with the Ibias input of the 4th time delay module.
Described resistor voltage divider circuit comprises operational amplifier, N-type metal-oxide-semiconductor NMt and resistance R 1-R5; Wherein, the positive input terminal of operational amplifier is connected with outside reference voltage VB1, and negative input end is connected with the source electrode of NMt, and output is connected with the grid of NMt; Drain electrode, grid and the source electrode of NMt is connected with resistance R 1 with the output of power vd D, operational amplifier respectively; Resistance R 1-R5 connects successively, one end ground connection GND of R5, and wherein the upper end of R1 and the negative input end of operational amplifier are connected, and the common port of R1 and R2 is the output of soft starting circuit.
ON-OFF control circuit comprises N-type metal-oxide-semiconductor NM1-NM4; Wherein, the drain electrode connecting resistance R1 of NM1, the common port of R2, grid connects the Out output of the first time delay module; The drain electrode connecting resistance R2 of NM2, the common port of R3, grid connects the Out output of the second time delay module; The drain electrode connecting resistance R3 of NM3, the common port of R4, grid connects the Out output of the 3rd time delay module; The drain electrode connecting resistance R4 of NM4, the common port of R5, grid connects the Out output of the 4th time delay module; The source electrode of NM1, NM2, NM3, NM4 is unified ground connection GND.
Time delay control module, comprises the first time delay module, the second time delay module, the 3rd time delay module, the 4th time delay module; The wherein Rset of the first time delay module end ground connection GND, the Out output of Rset termination first time delay module of the second time delay module, the Out output of Rset termination second time delay module of the 3rd time delay module, the Out output of Rset termination the 3rd time delay module of the 4th time delay module; The Enable Pin of first, second, third and fourth time delay module connects the EN output that makes energy control module simultaneously.
Figure 3 shows that time delay module circuit diagram.State first, second, third and fourth time delay module and include P type metal-oxide-semiconductor PM7-PM12, N-type metal-oxide-semiconductor NM5-NM13, or door OR1, inverter INV1 and capacitor C 1; Wherein: the source electrode of NM5-NM10, NM12, NM13 is ground connection simultaneously, and the source electrode of PM7-PM12 meets power vd D; The grid of NM5, NM7, NM8, NM12 is connected with the drain electrode of NM6, NM5 as time delay module Ibias input; After the grid of NM6, NM9, NM13 is connected or door OR1 output; The drain electrode of NM7 connects the drain electrode of PM7, and the drain electrode of NM8 connects the drain electrode of PM8, and the drain electrode of NM9 connects the drain electrode of PM9 and the grid of NM11, the grid of NM11 connect capacitor C 1 one end, the other end ground connection of C1; The drain electrode of NM11 connects the drain electrode of PM10, and the source electrode of NM11 connects the drain electrode of NM10, and the grid of NM10 connects the drain electrode of NM10; The grid of PM7 is connected with drain electrode, and the grid of PM8 is connected with drain electrode, and the grid of PM9 connects the grid of PM8; The grid of PM10 connects the grid of PM7, and the drain electrode of PM10 connects the drain electrode of PM11 and the grid of PM12, and the grid of PM11 connects the output of not gate INV1; The drain electrode of PM12 connects the drain electrode of NM12 and the drain electrode of NM13, and the drain electrode of NM12, NM13 is the Out output of time delay module; Or the input of door OR1 is respectively EN, the Rset input of time delay module, the input of the output termination INV1 of OR1.
Figure 4 shows that and make energy control module circuit diagram.Make energy control module comprise inverter INV2 and INV3; The wherein outside enable signal PD of the input termination of inverter INV2, even the PDN output of INV2 output energy control module, PDN connects the input of INV3; The output of the input termination INV2 of INV3, the output of INV3 is the EN output of time delay control module.It can enable current biasing circuit and delay control circuit.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendments or supplement or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Claims (7)
1. the novel soft starting circuit in LED driving, is characterized in that, comprising:
One current offset module: for whole soft starting circuit provides bias current;
One electric resistance partial pressure module: for output voltage provides biasing;
One switch control module: controlling resistance size;
One time delay control module: control switch control circuit is opened and the turn-off time, this time delay control module comprises first, second, third and fourth time delay module connecting successively;
One makes energy control module: enable current biasing circuit and delay control circuit;
Wherein, make the outside enable signal PD of input termination of energy control module, make the Enable Pin of energy control module EN output termination time delay control module, the Enable Pin of PDN output termination current offset module; The input termination foreign current IBIAS of current offset module, the output signal Ibias[3:0 of current offset module] difference access delay control module; The input of the output termination switch control module of time delay control module, the resistance value control end of the output connecting resistance division module of switch control module, the benchmark termination external reference voltage VB1 of electric resistance partial pressure module.
2. the novel soft starting circuit in a kind of LED driving according to claim 1, is characterized in that, described current offset module comprises P type metal-oxide-semiconductor PM1-PM6; Wherein, the source electrode of PM1-PM6 is connected with supply voltage VDD; The grid of PM1-PM5 is connected with IBIAS, and the grid of PM6 makes energy control module PDN output with connecing; The drain electrode of PM1 and PM6 meets IBIAS, the drain electrode of PM2 is connected with the Ibias input of the first time delay module, the drain electrode of PM3 is connected with the Ibias input of the second time delay module, the drain electrode of PM4 is connected with the Ibias input of the 3rd time delay module, and the drain electrode of PM5 is connected with the Ibias input of the 4th time delay module.
3. the novel soft starting circuit in a kind of LED driving according to claim 2, is characterized in that, described resistor voltage divider circuit comprises operational amplifier, N-type metal-oxide-semiconductor NMt and resistance R 1-R5; Wherein, the positive input terminal of operational amplifier is connected with reference voltage V B1, and negative input end is connected with the source electrode of NMt, and output is connected with the grid of NMt; Drain electrode, grid and the source electrode of NMt is connected with resistance R 1 with the output of power vd D, operational amplifier respectively; Resistance R 1-R5 connects successively, one end ground connection GND of R5, and wherein one end of R1 and the negative input end of operational amplifier are connected, and the common port of R1 and R2 is the output of soft starting circuit.
4. the novel soft starting circuit in a kind of LED driving according to claim 3, is characterized in that, described ON-OFF control circuit comprises N-type metal-oxide-semiconductor NM1-NM4; Wherein, the drain electrode connecting resistance R1 of NM1, the common port of R2, grid connects the Out output of the first time delay module; The drain electrode connecting resistance R2 of NM2, the common port of R3, grid connects the Out output of the second time delay module; The drain electrode connecting resistance R3 of NM3, the common port of R4, grid connects the Out output of the 3rd time delay module; The drain electrode connecting resistance R4 of NM4, the common port of R5, grid connects the Out output of the 4th time delay module; The source electrode of NM1, NM2, NM3, NM4 is unified ground connection GND.
5. the novel soft starting circuit in a kind of LED driving according to claim 4, is characterized in that, in described time delay control module; The Rset end ground connection GND of the first time delay module, the Out output of Rset termination first time delay module of the second time delay module, the Out output of Rset termination second time delay module of the 3rd time delay module, the Out output of Rset termination the 3rd time delay module of the 4th time delay module; The Enable Pin of first, second, third and fourth time delay module connects the EN output that makes energy control module simultaneously.
6. the novel soft starting circuit in a kind of LED driving according to claim 5, is characterized in that, described first, second, third and fourth time delay module includes P type metal-oxide-semiconductor PM7-PM12, N-type metal-oxide-semiconductor NM5-NM13, or door OR1, inverter INV1 and capacitor C 1; Wherein: the source electrode of NM5-NM10, NM12, NM13 is ground connection simultaneously, and the source electrode of PM7-PM12 meets power vd D; The grid of NM5, NM7, NM8, NM12 is connected with the drain electrode of NM6, NM5 as time delay module Ibias input; The grid of NM6, NM9, NM13 connects after being connected or the output of door OR1; The drain electrode of NM7 connects the drain electrode of PM7, and the drain electrode of NM8 connects the drain electrode of PM8, and the drain electrode of NM9 connects the drain electrode of PM9 and the grid of NM11, the grid of NM11 connect capacitor C 1 one end, the other end ground connection of C1; The drain electrode of NM11 connects the drain electrode of PM10, and the source electrode of NM11 connects the drain electrode of NM10, and the grid of NM10 connects the drain electrode of NM10; The grid of PM7 is connected with drain electrode, and the grid of PM8 is connected with drain electrode, and the grid of PM9 connects the grid of PM8; The grid of PM10 connects the grid of PM7, and the drain electrode of PM10 connects the drain electrode of PM11 and the grid of PM12, and the grid of PM11 connects the output of not gate INV1; The drain electrode of PM12 connects the drain electrode of NM12 and the drain electrode of NM13, and the drain electrode of NM12, NM13 is the Out output of time delay module; Or the input of door OR1 is respectively EN, the Rset input of time delay module, the input of the output termination INV1 of OR1.
7. the novel soft starting circuit of a kind of LED according to claim 6 in driving, is characterized in that, described in make energy control module comprise inverter INV2 and INV3; The wherein outside enable signal PD of the input termination of inverter INV2, even the PDN output of INV2 output energy control module, PDN connects the input of INV3; The output of the input termination INV2 of INV3, the output of INV3 is the EN output of time delay control module.
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| CN201410176530.1A CN103929861B (en) | 2014-04-29 | 2014-04-29 | Novel soft start circuit in LED driver |
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| CN201410176530.1A CN103929861B (en) | 2014-04-29 | 2014-04-29 | Novel soft start circuit in LED driver |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113364442A (en) * | 2020-03-02 | 2021-09-07 | 圣邦微电子（北京）股份有限公司 | Starting circuit and chip |
| CN116614115A (en) * | 2023-07-17 | 2023-08-18 | 芯天下技术股份有限公司 | Method for delay bias voltage establishment, bias circuit, comparator and integrated circuit |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5063303A (en) * | 1991-02-08 | 1991-11-05 | Racal Data Communications Inc. | Soft start circuit |
| US6617833B1 (en) * | 2002-04-01 | 2003-09-09 | Texas Instruments Incorporated | Self-initialized soft start for Miller compensated regulators |
| CN101004698A (en) * | 2005-12-20 | 2007-07-25 | 深圳创维－Rgb电子有限公司 | Method and circuit for preventing micro processing system form damages |
| CN101051790A (en) * | 2007-02-06 | 2007-10-10 | 西安交通大学 | Single chip high frequency DC-DC converter |
| CN101562394A (en) * | 2009-03-06 | 2009-10-21 | 西安民展微电子有限公司 | Soft start circuit used in monolithic integration switching-type regulator |
| US7723972B1 (en) * | 2008-03-19 | 2010-05-25 | Fairchild Semiconductor Corporation | Reducing soft start delay and providing soft recovery in power system controllers |
| US20130141059A1 (en) * | 2011-12-05 | 2013-06-06 | Charles Parkhurst | Dynamic bias soft start control apparatus and methods |
| CN103378718A (en) * | 2012-04-20 | 2013-10-30 | 中国科学院电子学研究所 | Multi-mode step-down DC-DC converter in-chip soft start circuit |
| CN103647440A (en) * | 2013-11-08 | 2014-03-19 | 上海华力微电子有限公司 | Soft-start circuit and DC-DC circuit including soft-start circuit |
| CN203814021U (en) * | 2014-04-29 | 2014-09-03 | 武汉大学 | Novel soft start circuit in LED driver |
-
2014
- 2014-04-29 CN CN201410176530.1A patent/CN103929861B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5063303A (en) * | 1991-02-08 | 1991-11-05 | Racal Data Communications Inc. | Soft start circuit |
| US6617833B1 (en) * | 2002-04-01 | 2003-09-09 | Texas Instruments Incorporated | Self-initialized soft start for Miller compensated regulators |
| CN101004698A (en) * | 2005-12-20 | 2007-07-25 | 深圳创维－Rgb电子有限公司 | Method and circuit for preventing micro processing system form damages |
| CN101051790A (en) * | 2007-02-06 | 2007-10-10 | 西安交通大学 | Single chip high frequency DC-DC converter |
| US7723972B1 (en) * | 2008-03-19 | 2010-05-25 | Fairchild Semiconductor Corporation | Reducing soft start delay and providing soft recovery in power system controllers |
| CN101562394A (en) * | 2009-03-06 | 2009-10-21 | 西安民展微电子有限公司 | Soft start circuit used in monolithic integration switching-type regulator |
| US20130141059A1 (en) * | 2011-12-05 | 2013-06-06 | Charles Parkhurst | Dynamic bias soft start control apparatus and methods |
| CN103378718A (en) * | 2012-04-20 | 2013-10-30 | 中国科学院电子学研究所 | Multi-mode step-down DC-DC converter in-chip soft start circuit |
| CN103647440A (en) * | 2013-11-08 | 2014-03-19 | 上海华力微电子有限公司 | Soft-start circuit and DC-DC circuit including soft-start circuit |
| CN203814021U (en) * | 2014-04-29 | 2014-09-03 | 武汉大学 | Novel soft start circuit in LED driver |
Non-Patent Citations (3)
| Title |
|---|
| 严鸣，成立: ""0.13μm BiCMOS低压差线性稳压器"", 《半导体技术》 * |
| 张强，田泽: ""带有软启动电路的高精密CMOS带隙基准源"", 《微电子学与计算机》 * |
| 李演明，来新泉: ""一种DC-DC开关电源片上软启动电路"", 《半导体学报》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113364442A (en) * | 2020-03-02 | 2021-09-07 | 圣邦微电子（北京）股份有限公司 | Starting circuit and chip |
| CN113364442B (en) * | 2020-03-02 | 2022-10-14 | 圣邦微电子（北京）股份有限公司 | Starting circuit and chip |
| CN116614115A (en) * | 2023-07-17 | 2023-08-18 | 芯天下技术股份有限公司 | Method for delay bias voltage establishment, bias circuit, comparator and integrated circuit |
| CN116614115B (en) * | 2023-07-17 | 2024-01-26 | 芯天下技术股份有限公司 | Method for delay bias voltage establishment, bias circuit, comparator and integrated circuit |
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| CN103929861B (en) | 2017-02-01 |
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