CN100514245C - Voltage regulator - Google Patents
Voltage regulator Download PDFInfo
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- CN100514245C CN100514245C CNB2006101216776A CN200610121677A CN100514245C CN 100514245 C CN100514245 C CN 100514245C CN B2006101216776 A CNB2006101216776 A CN B2006101216776A CN 200610121677 A CN200610121677 A CN 200610121677A CN 100514245 C CN100514245 C CN 100514245C
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Abstract
The invention comprises a voltage regulation unit and an over-driving unit. The voltage regulation unit is used to output a corresponding output voltage according to the input voltage; the over-driving unit is coupled to a place between the input end of voltage regulation unit and the output end of the voltage regulation unit, and is used for regulating the input voltage according to the comparison result between the output voltage and reference voltage.
Description
Technical field
The present invention is about a kind of voltage regulator, but and particularly about a kind of real-time regulated input voltage, to keep the voltage regulator of output-voltage levels.
Background technology
Traditional voltage regulator when not considering load, is generally a stable voltage output.But when load current moment changed, its output voltage can be because can't provide enough drive currents in real time, and cause the phenomenon of output voltage rapid drawdown.Especially when needs provide than high current drive capability, the source electrode driver of liquid crystal panel (LCD panel source driver) for example, the phenomenon of this voltage dip is more obvious.
Fig. 1 is the voltage regulator according to conventional art.Voltage regulator 100 comprises voltage generator 110 and voltage-regulation unit 120.Voltage generator 110 utilizes current source I
REFProvide input voltage INT negative input end with the common points of resistance R 13 to operational amplifier 122.Because imaginary short principle (Principleof Virtual Short Circuit), resistance R 11 equals input voltage INT with the voltage of the common points of resistance R 12.At this moment, resistance R 11 produces output voltage OUT with the common points of P transistor npn npn (PMOS transistor) P11.Capacitor C
LFunction be the output voltage OUT of burning voltage regulator 100, make it can be because of the acutely change thereupon of load current 130 instantaneous variation.As shown in Figure 1, the load current I that is coupled when traditional voltage regulator 100
LWhen instantaneous variation was big more, the phenomenon of its output voltage OUT rapid drawdown was also just more obvious.Therefore, voltage regulator 100 must be when output voltage OUT produces rapid drawdown, the driving force of effective booster tension regulon 120.
Summary of the invention
One of them is that a kind of voltage regulator is being provided for a purpose of the present invention, and when output voltage changed rapid drawdown because of load current, the level of scalable input voltage improved the driving force of voltage regulator.
One of them is that a kind of voltage regulator is being provided for a purpose of the present invention, applicable to driving bigger current loading, changes according to the level of output voltage, and the driving force of real-time regulated voltage regulator is kept the level of output voltage.
For realizing above-mentioned and other purposes, the present invention proposes a kind of voltage regulator, and this voltage regulator comprises voltage-regulation unit and over-drive unit.The voltage-regulation unit produces corresponding output voltage according to input voltage.Over-drive unit is coupled between the output terminal of the input end of voltage-regulation unit and voltage-regulation unit, and according to the comparative result of output voltage and reference voltage, regulates input voltage.Wherein over-drive unit comprises a voltage comparator circuit, is coupled to the output terminal of voltage regulator, in order to the output voltage and the reference voltage of comparative voltage regulator, and exports the signal of overdriving; And overdrive circuit, be coupled between the input end of voltage comparator circuit and voltage-regulation unit, and according to the signal of overdriving, regulate the input voltage of this voltage-regulation unit, wherein if output voltage greater than reference voltage, the signal of then overdriving is a low logic level, and input voltage is normal level; If output voltage is less than reference voltage, the signal of then overdriving is a high logic level, and over-drive unit improves the level of input voltage.
Wherein, if output voltage not corresponding to reference voltage, is then regulated input voltage, make output voltage corresponding to reference voltage.
The principle that the present invention overdrives because of utilization changes according to the level of output voltage, and the input voltage of real-time regulated voltage regulator to keep enough driving forces, makes voltage regulator be able to fast quick-recovery because of the voltage dip that the change of load produces.Therefore, voltage regulator of the present invention is applicable to the load of the big drive current of needs, for example source electrode driver of display panels.
For above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, preferred embodiment of the present invention cited below particularly, and conjunction with figs. are described in detail as follows.
Description of drawings
Fig. 1 is a voltage regulator according to conventional art for Fig. 1.
Fig. 2 is the circuit block diagram of voltage regulator according to an embodiment of the invention.
Fig. 3 is the circuit diagram of voltage-regulation unit according to another embodiment of the present invention.
Fig. 4 is the circuit diagram of voltage-regulation unit according to another embodiment of the present invention.
Fig. 5 is the circuit diagram according to the voltage generating circuit of the embodiment of the invention.
Fig. 6 is the circuit diagram according to the overdrive circuit of the embodiment of the invention.
The main element symbol description
VDD: operating voltage
GND: earth terminal
INT: input voltage
OUT: output voltage
C
L: electric capacity
I
L: load current
I
REF, I
51, I
61～I
64: current source
R11～R13, R31, R32, R41, R42: resistance
R51～R53, R61～R65: resistance
REV: reference voltage
P11, P31, P51:PMOS transistor
N41, N51:NMOS transistor
OD: the signal of overdriving
S61～S64: switch
VB1, VB2: dc offset voltage
100,200: voltage regulator
110: voltage generator
120: the voltage-regulation unit
122,322,422: operational amplifier
130,330,430: load
210: over-drive unit
220,420: the voltage-regulation unit
212: voltage generating circuit
214: comparer
215: voltage comparator circuit
216: overdrive circuit
Embodiment
Fig. 2 is the circuit block diagram of voltage regulator according to an embodiment of the invention.Voltage regulator 200 comprises over-drive unit 210 and voltage-regulation unit 220.Wherein, voltage-regulation unit 220 produces output voltage OUT according to input voltage INT, and output voltage OUT and input voltage INT have a predetermined proportionate relationship, and this proportionate relationship can be determined by the circuit structure of voltage-regulation unit 220.
Over-drive unit 210 is coupled between the input end and output terminal of voltage-regulation unit 220, and according to the comparative result of output voltage OUT and reference voltage REV, regulates input voltage INT.Over-drive unit 210 comprises voltage comparator circuit 215 and overdrive circuit 216, voltage comparator circuit 215 is coupled to the output terminal of voltage regulator 200, in order to comparison output voltage OUT and reference voltage REV, and export one and overdrive signal OD to overdrive circuit 216.And overdrive circuit 216 is coupled between the input end of voltage comparator circuit 215 and voltage-regulation unit 220, according to the above-mentioned signal OD that overdrives, regulates input voltage INT.When the load (load current or load capacitance) of output voltage OUT produces instantaneous variation, reduce the voltage dip phenomenon of output voltage OUT.
In the present embodiment, voltage comparator circuit 215 comprises voltage generating circuit 212 and comparer 214.Voltage generating circuit 212 is in order to producing above-mentioned reference voltage REV, and comparer 214 is then in order to relatively output voltage OUT and reference voltage REV, and exports the signal OD that overdrives according to comparative result.In the present embodiment, greater than reference voltage REV, then comparer 214 is exported the signal OD that overdrives of low logic levels as if output voltage OUT, and less than reference voltage REV, then comparer 214 is exported the signal OD that overdrives of high logic levels as if output voltage OUT.
Next, further specify the voltage-regulation unit 220 of present embodiment.Fig. 3 is the circuit diagram of voltage-regulation unit according to another embodiment of the present invention.Voltage-regulation unit 220 is coupled between over-drive unit 210 and the load 330, according to the input voltage INT that overdrive circuit 210 is exported, produces output voltage OUT to load 330.
In the present embodiment, voltage-regulation unit 220 comprises operational amplifier 322, P transistor npn npn P31, resistance R 31, resistance R 32 and capacitor C
LThe negative input end of operational amplifier 322 is coupled to input voltage INT, and its positive input terminal is coupled to the common points of resistance R 31 and resistance R 32.P transistor npn npn P31 then is coupled between operating voltage VDD and the resistance R 31, and the grid of P transistor npn npn P31 is coupled to the output terminal of operational amplifier 322.Because operational amplifier 322 has the characteristic of imaginary short, so the voltage level of the positive input terminal of operational amplifier 322 can change along with the voltage level (output voltage INT) of negative input end.Therefore, output voltage OUT can equal INT* (1+R31/R32), and the INT in the following formula promptly represents the magnitude of voltage of input voltage INT, and R31, R32 promptly represent the resistance value of resistance R 31, R32 respectively.Therefore, as long as regulate the ratio of resistance R 31, R32, the just relativeness of adjustable output voltage OUT and input voltage INT.Capacitor C
LFunction be the output voltage OUT of burning voltage regulator 220, make it can be because of load current I
LInstantaneous variation and with violent change.
In the present embodiment, voltage comparator circuit 215 is when homeostasis, and output voltage OUT is higher than reference voltage REV, and the signal OD that overdrives is a low logic level, and represent with equivalent load electric current I L in the load 330.When load 330 instantaneous variation, output voltage OUT can produce the phenomenon of voltage dip.As output voltage OUT during less than reference voltage REV, the signal OD that overdrives transfers high logic level to, therefore over-drive unit 210 can improve input voltage INT, and then improves the driving force of operational amplifier 322, makes the electric current fast rise of P transistor npn npn P31 institute conducting.And come the magnitude of voltage of fast lifting output voltage OUT via higher current lead-through ability, reduce the phenomenon of output voltage OUT rapid drawdown.When output voltage OUT returns to when being higher than reference voltage REV, the signal OD that overdrives reverts to low logic level, and over-drive unit 210 then is adjusted to original voltage level with input voltage INT.
Fig. 4 is the circuit diagram of voltage-regulation unit according to another embodiment of the present invention.Voltage-regulation unit 420 is coupled between over-drive unit 210 and the load 430.Voltage-regulation unit 420 comprises operational amplifier 422, N transistor npn npn (nmos pass transistor) N41, resistance R 41, R42.Resistance R 41, R42 coupled in series are between operating voltage VDD and N transistor npn npn N41, and the common points of resistance R 41, R42 is coupled to the positive input terminal of operational amplifier 422.Therefore, the voltage level of the common points of resistance R 41, R42 equals input voltage INT.And can equaling operating voltage VDD, output voltage OUT deducts bias voltage on resistance R 41, the R42.Those skilled in the art of the present technique, via of the present invention open, should know the relativeness of output voltage OUT and input voltage INT among Fig. 4 easily by inference, do not add tired stating at this.
Load 330 main difference among load 430 in the present embodiment and Fig. 3 are load current I
LThe direction of current difference.Only be the load of the voltage regulator circuit of expression present embodiment applicable to different kenels, the load that the present invention was suitable for is not limited to the equivalent electrical circuit form of above-mentioned load 330,430.
Next, further specify the embodiment of voltage generating circuit 212 in the present embodiment.Fig. 5 is the circuit diagram according to the voltage generating circuit of present embodiment.Only enumerate three kinds of different voltage generating circuits (Fig. 5 (a)-Fig. 5 (c)) among Fig. 5, but the present invention is as limit, as long as the mode that can produce steady voltage source is all applicable to the voltage generating circuit of present embodiment.
Among Fig. 5 (a), can be via Control current source I
51The current value of the resistance R that exports to 51 is regulated the magnitude of voltage of reference voltage REV.Then replace current source I among Fig. 5 (b) with P transistor npn npn P51
51, VB1 is the electric current of may command P transistor npn npn P51 institute conducting via the control bias voltage, and then the reference voltage REV that common points produced of controlling resistance R52 and P transistor npn npn P51.And among Fig. 5 (c), resistance R 53 and N transistor npn npn N51 coupled in series can be regulated the magnitude of voltage of reference voltage REV via the magnitude of voltage of control bias voltage VB2 between operating voltage VDD and earth terminal GND.Have in the present technique field and to know the knowledgeable usually,, should know circuit operation details and principle among Fig. 5 easily by inference, do not add tired stating at this via of the present invention open.
Fig. 6 is the circuit diagram according to the overdrive circuit of present embodiment.Only enumerate the embodiment (Fig. 6 (a)-Fig. 6 (c)) of three kinds of overdrive circuits 216 in the present embodiment, the present invention is not as limit, as long as can regulate the circuit of input voltage INT according to the signal OD that overdrives.And in Fig. 6 (a)-Fig. 6 (c) example example, switch S 61～S64 is promptly according to overdriving signal OD selectivity conducting or open circuit, in order to regulate input voltage INT.Next, further specify the circuit structure of Fig. 6 (a)-Fig. 6 (c).
Among Fig. 6 (a), overdrive circuit 216 comprises resistance R 61, R62, switch S 61, S62 and current source I
61Resistance R 61, R62 coupled in series are in current source I
61And between the earth terminal GND.One end of switch S 61 is coupled to current source I
61With the common points of resistance R 61, the other end of switch S 61 couples the output terminal of overdrive circuit 216.One end of switch S 62 is coupled to the common points of resistance R 61 and resistance R 62, and the other end of switch S 62 couples the output terminal of overdrive circuit 216.The output terminal of overdrive circuit 216 is then in order to produce input voltage INT.
Wherein, whether switch S 61, S62 determine its conducting according to the voltage comparator circuit 215 signal OD that overdrives that exports.Please refer to the embodiment of Fig. 3, under normal condition, can make output voltage OUT be higher than reference voltage REV, switch S 61 open circuits, switch S 62 conductings.When output voltage OUT makes that because of load variations output voltage OUT is lower than reference voltage REV, then switch S 61 conductings, switch S 62 open circuits.When output voltage OUT is higher than reference voltage REV, then return under the normal condition i.e. switch S 62 conductings, switch S 61 open circuits.Input voltage INT changes along with the conducting state of switch S 61, S62.When switch S 61 conductings, input voltage INT is bigger, and when switch S 62 conductings, input voltage INT is obviously less, because of the voltage difference of resistance R 62 to earth terminal only arranged.Utilize the control of the conducting state of switch S 61, S62, i.e. the voltage level of scalable input voltage INT.When illustrating, under normal condition, can make output voltage OUT be lower than reference voltage REV as if embodiment with Fig. 4, and switch S 61 conductings, switch S 62 open circuits.When output voltage OUT makes output voltage OUT be higher than reference voltage REV because of load variations, then switch S 62 conductings, switch S 61 open circuits.When output voltage OUT is lower than reference voltage REV, then return under the normal condition i.e. switch S 61 conductings, switch S 62 open circuits.
Among Fig. 6 (b), resistance R 63 and resistance R 64 coupled in series are in current source I
62And between the earth terminal GND, switch S 63 then is coupled to the two ends of resistance R 63.Please refer to the embodiment of Fig. 3, under normal condition, can make output voltage OUT greater than reference voltage REV, switch S 63 is conducting under normal conditions.When output voltage OUT because of load variations during less than reference voltage REV, switch S 63 open circuits then, input voltage INT then with rising.If the embodiment with Fig. 4 does explanation, under normal condition, can make output voltage OUT less than reference voltage REV, switch S 63 is open circuit under normal conditions.When output voltage OUT because of load variations during greater than reference voltage REV, then switch S 63 conductings, input voltage INT then descends thereupon.
Among Fig. 6 (c), current source I
63Be coupled to resistance R 65, an end of switch S 64 is coupled to current source I
64, the other end of switch S 64 is coupled to current source I
63Common points with resistance R 65.Please refer to the embodiment of Fig. 3, under normal condition, can make output voltage OUT greater than reference voltage REV, switch S 64 is open circuit under normal conditions.When output voltage OUT because of load variations during less than reference voltage REV, then switch S 64 conductings, current source I
63, I
64The electric current resistance R 65 of all flowing through.Therefore, input voltage INT just with rising.If the embodiment with Fig. 4 does explanation, under normal condition, can make output voltage OUT less than reference voltage REV, switch S 64 is conducting under normal conditions.When output voltage OUT because of load variations during greater than reference voltage REV, then switch S 64 open circuits only have current source I
63The electric current resistance R 65 of flowing through.Therefore, input voltage INT just descends thereupon.
The embodiment of above-mentioned Fig. 6 (a)-(c) has illustrated that under several cases according to the circuit structure of different overdrive circuits, the preset relation of regulating between reference voltage and the output voltage reduces load variations to output voltage influence.Only must when load variations, not only can reduce the situation of output voltage rapid drawdown, also can reduce the situation of voltage swells, make voltage regulator have more stable output voltage via setting suitable reference voltage and cooperating corresponding overdrive circuit structure.Above-mentioned Fig. 6 (a)-(c) only is embodiments of the invention, do not limit the circuit structure of overdrive circuit of the present invention, have in the present technique field and know the knowledgeable usually, via of the present invention open with this, should know all the other feasible circuit structures easily by inference, not add tired stating at this.
In another embodiment of the present invention, also can utilize the principle of electric resistance partial pressure, produce a plurality of voltage levels, and according to the comparative result of output voltage OUT and reference voltage REV.Use above-mentioned a plurality of voltage level, change the input voltage INT of voltage regulator 200.Simultaneously, also can regulate the amplitude of variation of input voltage, to keep the stability of output voltage OUT according to the amplitude of variation of output voltage OUT.Have in the present technique field and to know the knowledgeable usually,, should know by inference easily and utilize the embodiment of electric resistance partial pressure, do not add tired stating at this as input voltage INT via of the present invention open.
The principle that utilization of the present invention is overdrived, when voltage regulator causes output voltage to change because of load current generation temporal variations, the voltage level of real-time regulated input voltage to improve the driving force of voltage regulator, reduces load variations to output voltage influence.
Though the present invention with preferred embodiment openly as above; right its is not that any those skilled in the art are under the situation that does not break away from the spirit and scope of the present invention in order to qualification the present invention; can change and modification, so protection scope of the present invention is as the criterion with the claim institute restricted portion that is proposed.
Claims (12)
1. voltage regulator comprises:
One voltage-regulation unit according to an input voltage, produces an output voltage; And
One over-drive unit, be coupled between the output terminal of the input end of this voltage-regulation unit and this voltage-regulation unit, and according to the comparative result of this output voltage and a reference voltage, regulate this input voltage, wherein said over-drive unit comprises a voltage comparator circuit, be coupled to the output terminal of this voltage regulator,, and export the signal of overdriving in order to relatively output voltage and this reference voltage of this voltage regulator; And an overdrive circuit, be coupled between the input end of this voltage comparator circuit and this voltage-regulation unit, and, regulate the input voltage of this voltage-regulation unit according to this signal of overdriving,
Wherein if this output voltage greater than this reference voltage, then this signal of overdriving is a low logic level, this input voltage is normal level; If this output voltage is less than this reference voltage, then this signal of overdriving is a high logic level, and this over-drive unit improves the level of this input voltage.
2. voltage regulator as claimed in claim 1, wherein this voltage-regulation unit comprises:
One operational amplifier has a positive input terminal, a negative input end, an output terminal, and this negative input end of this operational amplifier is coupled to this input voltage;
One P transistor npn npn, this P transistor npn npn are coupled between an operating voltage and one first resistance, and the grid of this P transistor npn npn is coupled to the output terminal of this operational amplifier;
One second resistance be coupled between the other end and an earth terminal of this first resistance, and the common points of this first resistance and this second resistance is coupled to the positive input terminal of this operational amplifier; And
One capacitor is coupled between the output terminal and an earth terminal of this voltage-regulation unit;
Wherein, this negative input end of this operational amplifier is the input end of this voltage-regulation unit, and the common points of this P transistor npn npn and this first resistance is the output terminal of this voltage-regulation unit, and produces this output voltage.
3. voltage regulator as claimed in claim 2 is wherein if this output voltage less than this reference voltage, then improves this input voltage.
4. voltage regulator as claimed in claim 1, wherein this voltage-regulation unit comprises:
One operational amplifier has a positive input terminal, a negative input end, an output terminal, and this negative input end of this operational amplifier is coupled to this input voltage;
One N transistor npn npn, this N transistor npn npn is coupled between one first resistance and the earth terminal, and the grid of this N transistor npn npn is coupled to the output terminal of this operational amplifier;
One second resistance is coupled between the other end of an operating voltage and this first resistance, and the common points of this first resistance and this second resistance is coupled to the positive input terminal of this operational amplifier; And
One capacitor is coupled between the output terminal and an earth terminal of this voltage-regulation unit;
Wherein, this negative input end of this operational amplifier is the input end of this voltage-regulation unit, and the common points of this N transistor npn npn and this first resistance is the output terminal of this voltage-regulation unit, and produces this output voltage.
5. voltage regulator as claimed in claim 4 is wherein if this output voltage greater than this reference voltage, then reduces this input voltage.
6. voltage regulator as claimed in claim 1, wherein this voltage comparator circuit comprises:
One voltage generating circuit is in order to produce this reference voltage; And
One comparer in order to relatively output voltage and this reference voltage of this voltage regulator, and is exported one and is overdrived signal to this overdrive circuit.
7. voltage regulator as claimed in claim 6, wherein this voltage generating circuit comprises:
One resistance, an end of this resistance is coupled to an earth terminal; And
One P transistor npn npn is coupled between the other end of an operating voltage and this resistance, and the grid of this P transistor npn npn is coupled to a direct current bias voltage, and the common points of this P transistor npn npn and this resistance is exported this reference voltage.
8. voltage regulator as claimed in claim 6, wherein this voltage generating circuit comprises:
One current source; And
One resistance is coupled between this current source and the earth terminal, and the common points of this resistance and this current source is exported this reference voltage.
9. voltage regulator as claimed in claim 6, wherein this voltage generating circuit comprises:
One resistance, an end of this resistance is coupled to an operating voltage; And
One N transistor npn npn is coupled between the other end and an earth terminal of this resistance, and the grid of this N transistor npn npn is coupled to a direct current bias voltage, and the common points of this N transistor npn npn and this resistance is exported this reference voltage.
10. voltage regulator as claimed in claim 1, wherein this overdrive circuit comprises:
One current source;
One first resistance is connected with one second resistance and is coupled between this current source and the earth terminal;
One first switch, an end of this first switch is coupled to the common points of this current source and this first resistance, and the other end of this first switch is coupled to the output terminal of this overdrive circuit; And
One second switch, an end of this second switch is coupled to the common points of this first resistance and this second resistance, and the other end of this second switch is coupled to the output terminal of this overdrive circuit;
Wherein, greater than this reference voltage, then this first switch is opened a way as if this output voltage, this second switch conducting, if this output voltage is less than this reference voltage, this first switch conduction then, this second switch open circuit, and the output terminal of this overdrive circuit is exported the input voltage of this voltage-regulation unit.
11. voltage regulator as claimed in claim 1, wherein this overdrive circuit comprises:
One current source;
One first resistance is connected with one second resistance and is coupled between this current source and the earth terminal; And
One switch, one end of this switch is coupled to the common points of this current source and this first resistance, the other end of this switch couples the common points of this first resistance and this second resistance, and the common points of this current source and this first resistance is the output terminal of this overdrive circuit;
Wherein, if this output voltage is greater than this reference voltage, this switch conduction then, if this output voltage is less than this reference voltage, this switch open circuit then, and the output terminal of this overdrive circuit is exported the input voltage of this voltage-regulation unit.
12. voltage regulator as claimed in claim 1, wherein this overdrive circuit comprises:
One first current source;
One second current source;
One resistance is coupled between this first current source and the earth terminal; And
One switch, an end of this switch is coupled to second current source, and the other end of this switch is coupled to the common points of this first current source and this resistance;
Wherein, greater than this reference voltage, then this switch is opened a way as if this output voltage, and less than this reference voltage, the output terminal of then this switch conduction, and this overdrive circuit is exported the input voltage of this voltage-regulation unit as if this output voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101216776A CN100514245C (en) | 2006-08-28 | 2006-08-28 | Voltage regulator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101216776A CN100514245C (en) | 2006-08-28 | 2006-08-28 | Voltage regulator |
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| CN101135917A CN101135917A (en) | 2008-03-05 |
| CN100514245C true CN100514245C (en) | 2009-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2006101216776A Expired - Fee Related CN100514245C (en) | 2006-08-28 | 2006-08-28 | Voltage regulator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI822323B (en) * | 2022-09-13 | 2023-11-11 | 華邦電子股份有限公司 | Voltage gateration circuit and semiconductor memory device |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102148567B (en) * | 2010-02-10 | 2015-07-08 | 上海华虹宏力半导体制造有限公司 | Voltage generating circuit |
| CN102279609B (en) * | 2010-06-09 | 2014-09-10 | 上海华虹宏力半导体制造有限公司 | Voltage regulator and reference voltage generating circuit thereof |
| CN102279303A (en) * | 2010-06-09 | 2011-12-14 | 上海宏力半导体制造有限公司 | Voltage detection circuit |
| JP5969221B2 (en) * | 2012-02-29 | 2016-08-17 | エスアイアイ・セミコンダクタ株式会社 | Voltage regulator |
| CN103699165B (en) * | 2013-11-21 | 2016-01-20 | 硅谷数模半导体（北京）有限公司 | Voltage-operated device |
| CN105405425B (en) * | 2015-12-24 | 2018-09-18 | 昆山龙腾光电有限公司 | A kind of driving current control switching circuit and display device |
| CN105788538B (en) * | 2016-05-16 | 2018-03-09 | 京东方科技集团股份有限公司 | Show driving voltage gating circuit |
| CN107257576B (en) * | 2017-07-26 | 2022-01-04 | Tcl移动通信科技（宁波）有限公司 | Mobile terminal, dynamic setting method of radio frequency switch voltage of mobile terminal and storage medium |
| CN111766912B (en) * | 2020-06-30 | 2022-03-04 | 启攀微电子（上海）有限公司 | Control circuit of wide-voltage low-power-consumption voltage-stabilizing source |
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2006
- 2006-08-28 CN CNB2006101216776A patent/CN100514245C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI822323B (en) * | 2022-09-13 | 2023-11-11 | 華邦電子股份有限公司 | Voltage gateration circuit and semiconductor memory device |
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| CN101135917A (en) | 2008-03-05 |
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