CN102147629A - Voltage regulator for regulating output voltage at random and relative voltage regulating method - Google Patents
Voltage regulator for regulating output voltage at random and relative voltage regulating method Download PDFInfo
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- CN102147629A CN102147629A CN2010101131539A CN201010113153A CN102147629A CN 102147629 A CN102147629 A CN 102147629A CN 2010101131539 A CN2010101131539 A CN 2010101131539A CN 201010113153 A CN201010113153 A CN 201010113153A CN 102147629 A CN102147629 A CN 102147629A
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Abstract
The invention relates to a voltage regulator for regulating an output voltage at random and a relative voltage regulating method. The voltage regulator comprises an amplifier, a power element, a delayed signal generator and a voltage generating circuit. The amplifier generates a control signal according to a reference voltage and a feedback voltage. The power element adjusts an output current according to the control signal so as to generate the output voltage. The delayed signal generator generates a plurality of sequence delayed signals with different delay times according to an externally-applied power supply initiation section signal. The voltage generating circuit provides an equivalent output resistor so as to generate the feedback voltage corresponding to the output voltage and adjusts the equivalent output resistor according to a plurality of sequence delayed signals so as to regulate wave forms of the output voltage.
Description
Technical field
The present invention relates to a kind of voltage regulator and associated voltage control method, relate in particular to a kind of voltage regulator and associated voltage control method that comes demodulating voltage in the sequence delays mode arbitrarily.
Background technology
In electronic product, voltage regulator (voltage regulator) is arranged between power supply circuit and the load circuit usually, its role is to provide a stable output voltage and large-scale output current, make output voltage when load moment changes, still can be stabilized in voltage level originally apace and different load currents is provided, and then the voltage transitions of full blast is provided.With mobile phone, personal digital assistant (personal digital assistant, PDA) and portable electronic product such as mobile computer be example, the voltage of its battery can descend with service time, can't maintain stable potential usually.If by low dropout regulator (low dropout regulator, LDO regulator), as long as the difference between the output voltage that input voltage that battery provided and low dropout regulator are estimated to provide is greater than a dropout voltage (dropout voltage), voltage regulator just provides the fixing output voltage load circuit to portable electronic product sustainably.
Please refer to Fig. 1, Fig. 1 is the synoptic diagram of a low dropout regulator 10 in a kind of prior art.Low dropout regulator 10 comprises an error amplifier (error amplifier) 110, one power component 120, a bleeder circuit 130, and an output capacitance Co.Low dropout regulator 10 can be with input voltage V
INBe converted to output voltage V
OUTTo drive a load (by resistance R
LRepresent), load current is then by I
LRepresent.Bleeder circuit 130 comprises resistance R
1And R
2, can be to output voltage V
OUTCarry out dividing potential drop to produce corresponding to output voltage V
OUTFeedback voltage V
FBError amplifier 110 can compare feedback voltage V
FBAnd reference voltage V
REFBetween difference, and produce corresponding control signal V according to this
SWOutput capacitance Co is parallel to pull-up resistor R
L, as load current I
LDuring flip-flop, output capacitance Co can temporarily provide load required a large amount of electric currents, to improve output voltage V
OUTTransient response (transient response).Power component 120 can be a P channel mos, and (it receives the control signal V that error amplifier 110 transmits in grid for P-channel metal oxide semiconductor, PMOS) switch
SW, receive input voltage V at source electrode
IN, and in drain electrode reception output voltage V
OUTWork as feedback voltage V
FBBe lower than reference voltage V
REFThe time, the control signal V that error amplifier 110 is produced
SWCan increase the output current of power component 120; Work as feedback voltage V
FBBe higher than reference voltage V
REFThe time, the control signal V that error amplifier 110 is produced
SWCan reduce the output current of power component 120.Therefore, low dropout regulator 10 can be with output voltage V
OUTBe stabilized in a predetermined value V
OUT_NOM, output voltage V wherein
OUTWith reference voltage V
REFMagnitude relationship as follows:
V
OUT＝(R
1+R
2)*V
REF/R
1
(R wherein
1+ R
2)/R
1Be fixed value
In advanced person's wireless communication transceiver (transceiver), its receiver (receiver) RX and transmitter (transmitter) TX are mutual starting, and meaning is that receiver RX and transmitter TX can not start simultaneously.The time interval (burst) that the starting time of transmitter TX only will spread out of in the grouping (package) of communication, all the other timer TX are for closing to reach purpose of power saving.Any time point in this transmitting time interval (transmitting burst), the signal of transmitter TX output must maintain constant characteristic (for example identical output power and phase place).But the circuit of transmitter TX (for example power amplifier) all has certain rising makes time response and shut-in time response, and tends to produce change because of temperature effect.For reaching characteristic constant between the whole district, need compensated the time response of transmitter TX circuit, for example the supply voltage (supply voltage) of adjusting the bias voltage (bias voltage) of transmitter TX circuit or transmitter TX along with the time compensates rising of transmitter TX circuit and makes time response and shut-in time response.Yet,, generally all be to produce by voltage regulator no matter be bias circuit or supply potential circuit.
Please refer to Fig. 2, Fig. 2 is the synoptic diagram in wireless communication transceiver when running of prior art.Waveform shown in Figure 2 is represented bias voltage or the supply voltage of transmitter TX and receiver RX, is provided by the low dropout regulator 10 of prior art.Transmitter TX spreads out of the time interval of communication grouping by B
T1～B
TnRepresent, and receiver RX receives the transmitting time interval of communication grouping by B
R1～B
RnRepresent.As previously mentioned, rising of transmitter TX and receiver RX tends to because of temperature effect produces change time response and shut-in time response, and the low dropout regulator 10 of prior art also can't afford redress.Therefore, in the time interval of difference transmitting-receiving communication grouping, the wireless communication transceiver of prior art possibly can't provide permanent character.
Summary of the invention
The invention provides a kind of voltage regulator with the next any modulation output voltage of sequence delays mode, it comprises an amplifier, couples a reference voltage and a feedback voltage to produce a control signal, and this amplifier comprises a first input end, couples this reference voltage; One second input end couples this feedback voltage; And an output terminal, export this control signal; One power component comprises one first end, couples an input voltage; One second end is exported this output voltage; And a control end, couple this control signal; One delay signal generator couples a power-supply initial wayside signaling to produce tool a plurality of sequence delays signals of different time delays; And a voltage generation circuit, couple this output voltage and these sequence delays signals to produce this feedback voltage.
The present invention also provides a kind of method of regulating output voltage in the sequence delays mode arbitrarily, its power-supply initial wayside signaling that comprises according to an outside supply produces a plurality of sequence delays signals, wherein exists the time delay of different length between each sequence delays signal and this power-supply initial wayside signaling; Adjust an equivalent output resistance according to these a plurality of sequence delays signals; Imitating output resistance according to these comes this output voltage is carried out dividing potential drop to produce this feedback voltage; And regulate this output voltage according to this feedback voltage.
The present invention also provides a kind of voltage regulator of regulating an output voltage in the sequence delays mode arbitrarily, its power-supply initial wayside signaling according to an outside supply produces tool a plurality of sequence delays signals of any time delay, regulate this output voltage according to these a plurality of sequence delays signals again, make this output voltage can reach a corresponding particular level at each special time.
Description of drawings
Fig. 1 is the synoptic diagram of a low dropout regulator in a kind of prior art.
Fig. 2 is the synoptic diagram in wireless communication transceiver when running of prior art.。
Fig. 3 is the synoptic diagram of a low dropout regulator among the present invention.
Fig. 4 is the synoptic diagram of voltage generation circuit in the embodiment of the invention.
Fig. 5 is the synoptic diagram of delay signal generator in the embodiment of the invention.
Sequential chart when Fig. 6 is low dropout regulator of the present invention running.
[main element symbol description]
130 bleeder circuits, 110,310 error amplifiers
330 voltage generation circuits, 120,320 power components
340 delay signal generators, 331,332 resistance circuits
10,30 low dropout regulator SW
1～SW
nSwitch
Co output capacitance INV1～INVn reverser
R
1, R
2, R
L, R
21～R
2nResistance
Embodiment
Please refer to Fig. 3, Fig. 3 is the synoptic diagram of a low dropout regulator 30 among the present invention.Low dropout regulator 30 comprises an error amplifier 310, a power component 320, a voltage generation circuit 330, a delay signal generator 340, and an output capacitance Co.Low dropout regulator 30 can be with an input voltage V
INBe converted to an output voltage V
OUTTo drive a load (by resistance R
LRepresent), load current is then by I
LRepresent.Output capacitance Co is parallel to pull-up resistor R
L, as load current I
LDuring flip-flop, output capacitance Co can temporarily provide load required a large amount of electric currents, therefore can improve output voltage V
OUTTransient response.Voltage generation circuit 330 can be to output voltage V
OUTCarry out dividing potential drop to produce corresponding to output voltage V
OUTFeedback voltage V
FB(V
OUT=K*V
REF).Error amplifier 310 can compare feedback voltage V
FBAnd reference voltage V
REFBetween difference, and produce corresponding control signal V according to this
SW Power component 320 can be the element of a P channel mos switch or other tool similar functions, and it receives the control signal V that error amplifier 310 transmits in grid
SW, receive input voltage V at source electrode
IN, and in drain electrode reception output voltage V
OUTPower component 320 is according to control signal V
SWOperate: work as feedback voltage V
FBBe lower than reference voltage V
REFThe time, the control signal V that error amplifier 310 is produced
SWCan increase the output current of power component 320; Work as feedback voltage V
FBBe higher than reference voltage V
REFThe time, the control signal V that error amplifier 310 is produced
SWCan reduce the output current of power component 320.
Please refer to Fig. 4, Fig. 4 is the synoptic diagram of voltage generation circuit 330 in the embodiment of the invention.In this embodiment, voltage generation circuit 330 comprises two resistance circuits 331 and 332, the output voltage V that can receive for node N1
OUTCarry out dividing potential drop, and provide corresponding feedback voltage V in node N2
FBResistance circuit 331 and 332 equivalent resistance are respectively by R
EQ1And R
EQ2Represent, so output voltage V
OUTWith reference voltage V
REFMagnitude relationship as follows:
V
OUT＝(R
EQ1+R
EQ2)*V
REF/R
EQ1＝K*V
REF
K=(R wherein
EQ1+ R
EQ2) * R
EQ1
Resistance circuit 331 is coupled between node N1 and the N2, and it comprises a resistance R
1, so equivalent resistance R
EQ1Value by resistance R
1Decide; Resistance circuit 332 is coupled between node N2 and the earthing potential, and it comprises (n+1) individual resistance R
20～R
2nWith n switch SW
1～SW
nSwitch SW
1～SW
nThe inhibit signal DLY1 that transmits according to delay signal generator 240～DLYn operates respectively, so equivalent resistance R
EQ2Value by switch SW
1～SW
nIn the number of switches and the resistance R that are switched on
20～R
2nValue decide.For instance, if switch SW
1～SW
nBe all and close (open circuit), equivalent resistance R
EQ2Value be infinitely great; If switch SW
1～SW
nBe all unlatching (short circuit), equivalent resistance R
EQ2Value be
Therefore, the present invention can change the K value to adjust output voltage V according to inhibit signal DLY1～DLYn
OUTIn the predetermined value of different time points, and then regulate output voltage V
OUTWaveform.In the embodiment shown in fig. 4, resistance circuit 331 provides the equivalent resistance R of fixed value
EQ1, and resistance circuit 332 provides adjustable equivalent resistance R
EQ2Yet in other embodiment of the present invention, resistance circuit 331 can provide adjustable equivalent resistance R
EQ1, and resistance circuit 332 can provide the equivalent resistance R of fixed value
EQ2Perhaps resistance circuit 331 and 332 all provides adjustable equivalent resistance R
EQ1And R
EQ2Circuit shown in Figure 4 only for embodiments of the invention are described, not delimit the scope of the invention.
Please refer to Fig. 5, Fig. 5 is the synoptic diagram of delay signal generator 340 in the embodiment of the invention.In this embodiment, delay signal generator 340 comprises the reverser INV1～INVn of n serial connection, can produce tool n level inhibit signal DLY1～DLYn of different time delays according to power-supply initial wayside signaling POWER_ON_BURST.Circuit shown in Figure 5 only for embodiments of the invention are described, not delimit the scope of the invention.
Please refer to Fig. 6, the sequential chart when Fig. 6 is low dropout regulator of the present invention 30 runnings.Fig. 6 has shown power-supply initial wayside signaling POWER_ON_BURST, inhibit signal DLY1～DLYn, equivalent resistance R
EQ2, and output voltage V
OUTWaveform.For convenience of description, exist Δ T time delay of equal length among inhibit signal DLY1～DLYn between each grade signal and its prime signal, and the value also identical (representing by R) of all resistance in the voltage generation circuit 330.In the embodiment shown in fig. 6, inhibit signal DLY1～DLYn actuating switch SW in regular turn
1～SW
n: when inhibit signal DLY1 switches to noble potential by electronegative potential, R
EQ2=2R; When inhibit signal DLY2 switches to noble potential by electronegative potential, R
EQ2=3R/2; When inhibit signal DLY3 switches to noble potential by electronegative potential, R
EQ2=4R/3; ...; When inhibit signal DLYn switches to noble potential by electronegative potential, R
EQ2=(1+1/n) R.In other words, output voltage V
OUTInitial predetermined value the highest, afterwards again along with the K value that reduces gradually reaches a stable potential, but the therefore output voltage of modulation difference time delays.
The power-supply initial wayside signaling that low dropout regulator of the present invention applies according to the outside produces the tool multilevel delay signal of different time delays, adjust the predetermined value of output voltage more according to this in different time points, therefore not only can provide fixing output voltage constantly, also can regulate the waveform of output voltage arbitrarily.
The above only is the preferred embodiments of the present invention, and all equalizations of doing according to claims of the present invention change and modify, and all should belong to covering scope of the present invention.
Claims (14)
1. one kind is come the voltage regulator of any modulation output voltage in the sequence delays mode, and it comprises:
One amplifier couples a reference voltage and a feedback voltage to produce a control signal, and this amplifier comprises:
One first input end couples this reference voltage;
One second input end couples and receives this feedback voltage; And
One output terminal is exported this control signal;
One power component, it comprises:
One first end couples an input voltage;
One second end is exported this output voltage; And
One control end couples this control signal;
One delay signal generator, the power-supply initial wayside signaling that couples an outside supply is to produce tool a plurality of sequence delays signals of different time delays; And
One voltage generation circuit couples this output voltage and these sequence delays signals to produce this feedback voltage.
2. voltage regulator as claimed in claim 1, wherein this voltage generation circuit comprises:
One first node is used for receiving this output voltage;
One Section Point is used for exporting this feedback voltage;
One first resistance circuit is coupled between first and second nodes of this voltage generation circuit; And
One second resistance circuit is coupled between the Section Point and a bias voltage of this voltage generation circuit, and it adjusts these effect output resistances according to these a plurality of sequence delays signals.
3. voltage regulator as claimed in claim 2, wherein this second resistance circuit comprises:
One first resistance, its first end is coupled to the Section Point of this voltage generation circuit;
A plurality of second resistance, first end of each second resistance is coupled to second end of this first resistance, and second end of each second resistance is coupled to this bias voltage; And
A plurality of delay switches are serially connected with second end of corresponding second resistance respectively, and control signal transmission path between corresponding second resistance and this bias voltage according to corresponding inhibit signal respectively.
4. voltage regulator as claimed in claim 1, wherein this voltage generation circuit comprises:
One first node is used for receiving this output voltage;
One Section Point is used for exporting this feedback voltage;
One first resistance circuit is coupled between first and second nodes of this voltage generation circuit, and it adjusts these effect output resistances according to these a plurality of sequence delays signals; And
One second resistance circuit is coupled between the Section Point and this bias voltage of this voltage generation circuit.
5. voltage regulator as claimed in claim 4, wherein this first resistance circuit comprises:
One first resistance, its first end is coupled to the first node of this voltage generation circuit;
A plurality of second resistance, first end of each second resistance is coupled to second end of this first resistance; And
A plurality of delay switches are serially connected with second end of corresponding second resistance respectively, and control signal transmission path between the Section Point of corresponding second resistance and this voltage generation circuit according to corresponding inhibit signal respectively.
6. voltage regulator as claimed in claim 1, wherein this voltage generation circuit comprises:
One first node is used for receiving this output voltage;
One Section Point is used for exporting this feedback voltage;
One first resistance circuit is coupled between first and second nodes of this voltage generation circuit, and it adjusts these effect output resistances according to these a plurality of sequence delays signals; And
One second resistance circuit is coupled between the Section Point and a bias voltage of this voltage generation circuit, and it adjusts these effect output resistances according to these a plurality of sequence delays signals.
7. voltage regulator as claimed in claim 2, wherein:
This first resistance circuit comprises:
One first resistance, its first end is coupled to the first node of this voltage generation circuit;
A plurality of second resistance, first end of each second resistance is coupled to second end of this first resistance; And
A plurality of first postpones switches, is serially connected with second end of corresponding second resistance respectively, and controls signal transmission path between the Section Point of corresponding second resistance and this voltage generation circuit according to corresponding inhibit signal respectively; And
This second resistance circuit comprises:
One the 3rd resistance, its first end is coupled to the Section Point of this voltage generation circuit;
A plurality of the 4th resistance, first end of each the 4th resistance is coupled to second end of the 3rd resistance, and second end of each the 4th resistance is coupled to this bias voltage; And
A plurality of second postpones switches, is serially connected with second end of corresponding the 4th resistance respectively, and controls signal transmission path between corresponding the 4th resistance and this bias voltage according to corresponding inhibit signal respectively.
8. voltage regulator as claimed in claim 1, wherein this delay signal generator comprises the reverser of multi-stage serial connection.
9. voltage regulator as claimed in claim 1, wherein this power component is a P channel metal oxide semiconductor transistor.
10. method of regulating output voltage arbitrarily in the sequence delays mode, it comprises:
Power-supply initial wayside signaling according to an outside supply produces a plurality of sequence delays signals, wherein exists the time delay of different length between each sequence delays signal and this power-supply initial wayside signaling;
Adjust an equivalent output resistance according to these a plurality of sequence delays signals;
Imitating output resistance according to these comes this output voltage is carried out dividing potential drop to produce this feedback voltage; And
Regulate this output voltage according to this feedback voltage.
11. method as claimed in claim 10, it also comprises:
The size of this feedback voltage and a reference voltage relatively.
12. method as claimed in claim 11, it also comprises:
Size according to this feedback voltage and this reference voltage is regulated this output voltage.
13. method as claimed in claim 10 wherein exists time delay of equal length between adjacent two inhibit signals in these a plurality of sequence delays signals.
14. voltage regulator that comes any modulation one output voltage in the sequence delays mode, its power-supply initial wayside signaling according to an outside supply produces tool a plurality of sequence delays signals of any time delay, regulate this output voltage according to these a plurality of sequence delays signals again, make this output voltage can reach a corresponding particular level at each special time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101131539A CN102147629A (en) | 2010-02-04 | 2010-02-04 | Voltage regulator for regulating output voltage at random and relative voltage regulating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101131539A CN102147629A (en) | 2010-02-04 | 2010-02-04 | Voltage regulator for regulating output voltage at random and relative voltage regulating method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102147629A true CN102147629A (en) | 2011-08-10 |
Family
ID=44421943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101131539A Pending CN102147629A (en) | 2010-02-04 | 2010-02-04 | Voltage regulator for regulating output voltage at random and relative voltage regulating method |
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|---|---|
| CN (1) | CN102147629A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105630051A (en) * | 2014-10-28 | 2016-06-01 | 江苏绿扬电子仪器集团有限公司 | High-precision large-power dc voltage output control method |
| TWI633733B (en) * | 2017-04-18 | 2018-08-21 | 立積電子股份有限公司 | Power supply and method for operating a power supply |
| CN108595060A (en) * | 2018-02-13 | 2018-09-28 | 友达光电股份有限公司 | Touch sensing device |
| CN111258366A (en) * | 2018-11-30 | 2020-06-09 | 米彩股份有限公司 | Driving circuit for LED |
| CN111831046A (en) * | 2019-04-16 | 2020-10-27 | 联咏科技股份有限公司 | Output stage circuit and voltage stabilizer thereof |
| CN112701903A (en) * | 2021-01-22 | 2021-04-23 | Oppo广东移动通信有限公司 | Control circuit, switching power supply and electronic equipment |
| US11290136B2 (en) * | 2019-10-16 | 2022-03-29 | Richwave Technology Corp. | Radio frequency device and voltage generating device thereof |
| CN117439559A (en) * | 2023-10-20 | 2024-01-23 | 哈尔滨海鸿基业科技发展有限公司 | Power amplifying circuit for isolating pulse and control method |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105630051A (en) * | 2014-10-28 | 2016-06-01 | 江苏绿扬电子仪器集团有限公司 | High-precision large-power dc voltage output control method |
| TWI633733B (en) * | 2017-04-18 | 2018-08-21 | 立積電子股份有限公司 | Power supply and method for operating a power supply |
| US11073853B2 (en) | 2017-04-18 | 2021-07-27 | Richwave Technology Corp. | Power supply with low variation of total radiated power |
| CN108595060A (en) * | 2018-02-13 | 2018-09-28 | 友达光电股份有限公司 | Touch sensing device |
| CN111258366A (en) * | 2018-11-30 | 2020-06-09 | 米彩股份有限公司 | Driving circuit for LED |
| CN111831046A (en) * | 2019-04-16 | 2020-10-27 | 联咏科技股份有限公司 | Output stage circuit and voltage stabilizer thereof |
| US11290136B2 (en) * | 2019-10-16 | 2022-03-29 | Richwave Technology Corp. | Radio frequency device and voltage generating device thereof |
| CN112701903A (en) * | 2021-01-22 | 2021-04-23 | Oppo广东移动通信有限公司 | Control circuit, switching power supply and electronic equipment |
| CN112701903B (en) * | 2021-01-22 | 2022-03-18 | Oppo广东移动通信有限公司 | Control circuit, switching power supply and electronic equipment |
| CN117439559A (en) * | 2023-10-20 | 2024-01-23 | 哈尔滨海鸿基业科技发展有限公司 | Power amplifying circuit for isolating pulse and control method |
| CN117439559B (en) * | 2023-10-20 | 2024-05-17 | 哈尔滨海鸿基业科技发展有限公司 | Power amplifying circuit for isolating pulse and control method |
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Application publication date: 20110810 |