CN103095144B - Power supply circuit provided with voltage acceleration compensation - Google Patents
Power supply circuit provided with voltage acceleration compensation Download PDFInfo
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- CN103095144B CN103095144B CN201310001464.XA CN201310001464A CN103095144B CN 103095144 B CN103095144 B CN 103095144B CN 201310001464 A CN201310001464 A CN 201310001464A CN 103095144 B CN103095144 B CN 103095144B
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Abstract
The invention provides a power supply circuit provided with voltage acceleration compensation. The power supply circuit provided with voltage acceleration compensation is characterized by comprising a direct current power source, a transformer, a feedback unit, an acceleration compensation unit and a pulse width modulation circuit, wherein the direct current power source is used for providing direct current input voltage, the transformer is provided with a primary coil, a first-level coil and a second-level coil, the primary coil, is connected with the direct current power source and used for receiving the direct current input voltage, the first-level coil and the second-level coil are used for sensing the direct current input voltage and correspondingly output first output voltage and second output voltage for supply power to a load, the feedback unit is connected with the second-level coil and is used for sampling feedback signals and outputting feedback voltage, the acceleration compensation unit is connected with the feedback unit and used for accelerating the variation of the feedback voltage, and the pulse width modulation circuit is arranged between the transformer and the feedback unit and controls the direct current input voltage fed in the primary coil of the transformer according to the variation of the feedback voltage. By means of the power supply circuit provided with voltage acceleration compensation, the response speed of a feedback circuit can be improved, and power supply output can be more stable.
Description
Technical field
The present invention relates to a kind of power supply circuits, especially a kind of power supply circuits with voltage acceleration compensation.
Background technology
Certain according to Current electronic production development, electronic product function of today is more and more, therefore, under different mode of operations, its power supply circuits must can tackle the transient response that dynamic load causes, thus maintain the normal work of whole system, as shown in Figure 1, for a kind of in prior art function system structure figure of power supply circuits, in general, the voltage that DC power supply exports can after transformer pressure-reducing, a galvanic current pressure is exported again through rectifying and wave-filtering, supply and use to the electronic system of rear end and load, that is in order to the situation of real-time monitoring load, so be provided with feedback circuit in order to gather the change in voltage of load, thus the voltage output of transformer is changed according to this change in voltage control impuls controller, like this, just define a closed-loop control.
But, considerable IC is there is due in the electronic system that load end is corresponding, dynamic load is belonged to for this load power supply circuits, although foregoing circuit is provided with feedback circuit to guarantee the stable output of power supply circuits, once the change of load end is violent, and feedback circuit has little time to be tackled, and power supply circuits output voltage so namely can be caused delayed, its output voltage may not reach a reference voltage needed for load, will further cause whole system to break down like this.Therefore, for electronic product of today, we need design one immediately can tackle the power supply circuits of dynamic load variations.
Summary of the invention
In order to a more stable voltage can be provided to export, and the change of dynamic load can be tackled fast, the invention provides out a kind of power supply circuits with voltage acceleration compensation.
The invention provides a kind of power supply circuits with voltage acceleration compensation, it is characterized in that comprising:
DC power supply, in order to provide a DC input voitage;
Transformer, there is primary coil, the first secondary coil and second subprime coil, this primary coil connects this DC power supply in order to accept this DC input voitage, this first secondary coil and this second subprime coil are then in order to respond to this DC input voitage, corresponding output the first output voltage and the second output voltage, powering load;
Feedback unit, is connected to second subprime coil, in order to sampled feedback signal and output feedack voltage;
Accelerate compensating unit, be connected with this feedback unit, in order to accelerate the change of this feedback voltage;
Pulse width modulation circuit, is arranged between this transformer and this feedback unit, controls according to the change of this feedback voltage this DC input voitage size sending into transformer.
Alternatively, described power supply circuits also comprise a control switch, and connect this transformer and this pulse width modulation circuit, whether it controls this control switch conducting by the running status of this pulse width modulation circuit.
Alternatively, described power supply circuits also comprise an optical coupler, connect this pulse width modulation circuit and this feedback unit, wherein, the light effect LED that waits in this optical coupler connects this feedback unit, and the equivalent phototransistor in this optical coupler connects this pulse width modulation circuit.
Further, in described power supply circuits, this feedback unit comprises one the 3rd switch and a feedback output node, and the 3rd switch comprises:
First end, connects this feedback output node of this feedback unit;
Second end, connects this feedback signal, and this feedback signal is in order to control the conducting state of the 3rd switch;
And the 3rd end, be connected with earth point.
Preferably, this feedback unit also comprises the first resistance and second resistance of series connection mutually, wherein, one end of this first resistance connects the negative electrode of this first rectifier cell, one end of this second resistance connects the 3rd end of the 3rd switch, and this second end of the 3rd switch is connected to the series connection node of this first resistance and the second resistance, this feedback signal is the magnitude of voltage of this series connection node.
Alternatively, in described power supply circuits, the 3rd switch is three end adjustable shunt reference sources.
Preferably, described power supply circuits also comprise the first rectifier cell and the first filtering energy-storage travelling wave tube, the anode of this first rectifier cell connects this second subprime coil, and its negative electrode connects one end and this feedback unit of this first filtering energy-storage units, the other end ground connection of this first filtering energy-storage units.
Preferably, this feedback unit also comprises one the 3rd output, and this acceleration compensating unit is connected between the 3rd output and this feedback output node.
Alternatively, described power supply circuits also comprise the second rectifier cell and the 3rd filtering energy-storage travelling wave tube, the anode of this second rectifier cell connects this first secondary coil, its negative electrode connects one end and one first output of the 3rd filtering energy-storage units, the other end ground connection of the 3rd filtering energy-storage units, wherein, this first output is in order to export this first output voltage, and this acceleration compensating unit is connected between the negative electrode of this second rectifier cell and this series connection node.
Alternatively, power supply circuits also comprise isolated component and the second filtering energy-storage units, the anode of this isolated component is connected with the negative electrode of this first rectifier cell, its negative electrode connects one end and one second output of this second filtering energy-storage units, the other end ground connection of this second filtering energy-storage units, this second output is in order to export this second output voltage.
Alternatively, described power supply circuits also comprise a control module, and this control module comprises a second switch, and this second switch comprises:
First end, connects a control signal, and this control signal is in order to control the conducting state of this second switch;
Second end, is connected with earth point; And
3rd end, connects this feedback unit.
In actual applications, when this first output voltage is lower than a reference voltage, this acceleration compensating unit can change this feedback output node of this feedback circuit immediately to earth-current, thus the conducting state changing this optical coupler is cut-off state, when this pulse width modulation circuit detecting becomes cut-off state to this optical coupler, this pulse width modulation circuit then improves this DC input voitage size sending into transformer.
Further, in described power supply circuits, this acceleration compensating unit comprises one first switch and one the 3rd resistance, and this first switch comprises:
First end, connects the 3rd end of this second switch, in order to receive a Continuity signal;
Second end, connects the negative electrode of this first rectifier cell; And
3rd end, connects one end of the 3rd resistance;
Wherein, the other end ground connection of the 3rd resistance, when this second switch conducting, namely this Continuity signal this first end to this first switch can be produced, make this first switch conduction, the 3rd resistance carries out dividing potential drop, thus changes the series connection node voltage of this first resistance and this second resistance.
Alternatively, this first switch of described power supply circuits is enhancement mode field effect transistor.
Compared with prior art, the present invention is utilized to have the power supply circuits of voltage acceleration compensation, when there is acute variation in load end, the response speed of feedback circuit still can be accelerated by accelerating compensating unit, and then adjust pulse width modulation circuit fast, make output voltage can tackle the change of load end timely, thus it is more stable to allow the voltage of whole system export.
Accompanying drawing explanation
Fig. 1 is the function system structure figure of a kind of power supply circuits in prior art;
Fig. 2 is the function system structure figure of power supply circuits in first embodiment of the invention;
Fig. 3 is the circuit framework figure of the power supply circuits of first embodiment of the invention;
Fig. 4 is the circuit framework figure of the power supply circuits of second embodiment of the invention;
Fig. 5 is the circuit framework figure of the power supply circuits of third embodiment of the invention;
Embodiment
For making there is further understanding to object of the present invention, structure, feature and function thereof, embodiment is hereby coordinated to be described in detail as follows.
Please refer to Fig. 2, is the function system structure figure of power supply circuits in first embodiment of the invention.Power supply circuits of the present invention mainly comprise:
Direct voltage 10, in order to provide a DC input voitage V
0;
Transformer 11, it connects this DC power supply 10 in order to accept DC input voitage V
0, and to this DC input voitage V
0carry out step-down, power then to after rectifying and wave-filtering load 20, between load in the present embodiment 20 and transformer 11, be also provided with isolated location 18, make the voltage exporting load to not by the impact of former-section circuit change;
Feedback unit 12, connects and accelerates compensating unit 13, in order to sampled feedback signal and output feedack voltage;
Accelerate compensating unit 13, be connected with this feedback unit 12, in order to accelerate the change of feedback voltage;
Pulse width modulation circuit 15, is arranged between this transformer and this feedback unit, controls according to the change of this feedback voltage this DC input voitage V sending into transformer
0size.
In addition, in the present embodiment, also comprise a control module 14, be connected to and accelerate compensating unit 13, in order to provide a Continuity signal to acceleration compensating unit 13, accelerate compensating unit 13 carrys out feedback voltage change according to this Continuity signal; Control switch 16, is arranged and between transformer 11 and pulse width modulation circuit 15, and whether and ON time it can control self conducting according to the running status of pulse width modulation circuit 15.In certain embodiments, power supply circuits also comprise a control switch 16, it is connected between this transformer 11 and this pulse width modulation circuit 15, this control switch 16 be control self according to the running status of this pulse width modulation circuit 15 conducting whether, namely, when detecting pulse width modulation circuit 15 and bringing into operation, automatically open; When detecting pulse width modulation circuit 15 and being out of service, automatically close.
Further, please refer to Fig. 3, is the circuit framework figure of the power supply circuits of first embodiment of the invention.In the present invention, transformer 11 includes primary coil 110, first secondary coil 111 and second subprime coil 112, and primary coil 110 is directly connected with DC power supply 10, in order to receive a DC input voitage V
0, this voltage is realized exporting by the first secondary coil 111 and second subprime coil 112 after transformer 11 transformation.Concrete, first secondary coil 111 rear end connects a rectifier D1, the anode A of this rectifier D1 connects the first secondary coil 111, its negative electrode K also connects a 3rd filtering energy-storage travelling wave tube Csu3, and the voltage rectifier 111 exported from the first secondary coil 111 and the rectifying and wave-filtering of the 3rd filtering energy-storage travelling wave tube Csu3 can export the first output voltage V1 by the first output end vo ut1.Same, second subprime coil 112 rear end connects a rectifier D2, the anode A of this rectifier D2 connects second subprime coil 112, its negative electrode K also connects a first filtering energy-storage travelling wave tube Csu1, in the present embodiment, an isolated component Diso is also provided with between the negative electrode K and one second output end vo ut2 of rectifier D2, wherein, using the series connection node F of rectifier D2 and isolated component Diso as the sampled point fed back, when the voltage of this feedback sample point F changes, due to the effect of isolated component Diso, the second output voltage V2 of the second output end vo ut2 would not be affected, in addition, the negative electrode K of isolated component Diso also connects one second filtering energy-storage travelling wave tube Csu2, in order to export after the electric current of isolated component Diso carries out filtering again.
Accelerate compensating unit 13 and be connected to feedback sample point F with control module 14, this acceleration compensating unit 13 comprises a first switch Q1 and a 3rd resistance R8, and in the present embodiment, the first switch Q1 can be an enhancement mode field effect transistor, but not as limit.The grid G of the first switch Q1 is connected with control module 14, in order to receive a Continuity signal to realize the opening and closing of this first switch Q1; Its drain D is connected with one end of the 3rd resistance R8, the other end ground connection of the 3rd resistance R8; And its source S is then connected to feedback sample point F.Control module 14 comprises a second switch Q2, and in the present embodiment, second switch Q2 can be a triode, but not as limit.Its base stage B connects a control signal (system control), in order to control the conducting state of second switch Q2; Its collector electrode C is then connected to the grid G accelerating the first switch Q1 in compensating unit 13; And its emitter E ground connection.Wherein, control signal is the situation of change being controlled by the first output voltage V1, in the present embodiment, when the first output voltage V1 is lower than a reference voltage time, this control signal becomes high level, it can make second switch Q2 conducting, there is provided a Continuity signal to the grid G of the first switch Q1 by the emitter C of second switch Q2 further, thus make the first switch Q1 conducting, when after the first switch Q1 conducting, 3rd resistance R8 is then equivalent to the negative electrode K being directly connected in rectifier D2, and then reaches the object of attrition voltage.
Feedback circuit 12 is also connected to feedback sample point F, this feedback circuit 12 comprises the first resistance R4 and second resistance R5 and the 3rd switch I C2 of pair of series, one end of first resistance R4 is connected to feedback sample point F as shown in Figure 3, one end ground connection of the second resistance R5, wherein, first resistance R4 and the second resistance R5 defines a resistor voltage divider circuit, the voltage of the series connection node G both it namely as a feedback signal, in order to control the conducting state of the 3rd switch I C2.In the present embodiment, the three end adjustable shunt reference sources of the 3rd switch I C2 can be a model be TL431, but not as limit.Its anode 3 ground connection and negative electrode 1 connect the negative pole 2 waiting light effect LED A in optical coupler 17, and in addition, it is connected to the series connection node G of the first resistance R4 and the second resistance R5, in order to receive above-mentioned feedback signal with reference to 2, pole.
The positive pole 1 of light effect LED A that waits of optical coupler 17 inside connects a feedback output node P, and this feedback output node P correspondence connects one the 3rd output end vo ut3, the equivalent phototransistor B of optical coupler 17 inside is then connected with pulse width modulation circuit 15.
When the first output voltage V1 is in normal condition, feedback sample point F receives the normality voltage that second subprime coil 112 correspondence exports, therefore the voltage of the series connection node G of the first resistance R4 and the second resistance R5 i.e. voltage of the 3rd switch I C2 reference pole 2 is just in time close to the internal reference value of the 3rd switch I C2, therefore the 3rd switch I C2 becomes conducting state, now when after the 3rd switch I C2 conducting, feedback output node P then forms a current circuit over the ground, namely a forward current is had to flow through from the positive pole 1 of light effect LED A that waits of optical coupler 17 inside to negative pole 2, so shinny Deng light effect LED A conducting, and then make the equivalent phototransistor B also conducting of optical coupler 17 inside, so when pulse width modulation circuit 15 detects equivalent phototransistor B one-tenth conducting state, 15, this pulse width modulation circuit does not adjust the DC input voitage V inputing to primary coil 110
0size.
When the first output voltage V1 is lower than a reference voltage, control signal becomes high level, second switch Q2 becomes conducting state, namely the grid G of the first switch Q1 receives a Continuity signal simultaneously, so the first switch Q1 also can be switched on, now the 3rd resistance R8 is then equivalent to the negative electrode K being directly connected in rectifier D2, namely the 3rd resistance R8 starts the voltage consuming the first filtering energy-storage travelling wave tube Csu1 release, the voltage of this feedback sample point F reduces, simultaneously again because the existence of the 3rd resistance R8, the pace of change of the voltage of this feedback sample point F is faster than pace of change when not having the 3rd resistance R8, in addition, again owing to there being the existence of isolated component Diso, so the voltage that the second output voltage V2 of the second output end vo ut2 can not receive this feedback sample point F reduces and changes.After the voltage of this feedback sample point F reduces, the voltage of the first corresponding resistance R4 and the series connection node G of the second resistance R5 also can reduce, and namely the voltage of the 3rd switch I C2 reference pole 2 is less than the internal reference value of the 3rd switch I C2, the 3rd switch I C2 cut-off.When after the 3rd switch I C2 cut-off, feedback output node P then cannot form path over the ground, namely electric current is not had to pass through from the positive pole 1 of light effect LED A that waits of optical coupler 17 inside to negative pole 2, so wait light effect LED A cannot conducting just can not luminescence, corresponding, make the equivalent phototransistor B of optical coupler 17 inside also can become cut-off state, when pulse width modulation circuit 15 detects equivalent phototransistor B one-tenth cut-off state, 15, this pulse width modulation circuit can improve the DC input voitage V inputing to primary coil 110
0size, thus the first output voltage V1 is improved until reach a reference voltage, after this first output voltage V1 reaches a reference voltage, control signal then becomes low level, accelerating compensating unit 13 cannot conducting attrition voltage, therefore the voltage of the series connection node G of the first resistance R4 and the second resistance R5 raises, the voltage of the 3rd switch I C2 reference pole 2 can reach the internal reference value of the 3rd switch I C2 again, make the 3rd switch I C2 conducting, and then etc. light effect LED A conducting luminous, corresponding, the equivalent phototransistor B of optical coupler 17 inside is made to become conducting state, when pulse width modulation circuit 15 detects equivalent phototransistor B one-tenth conducting state again, 15, this pulse width modulation circuit does not continue to improve the DC input voitage V inputing to primary coil 110
0size.
In the present invention, besides the above described embodiments, other two kinds of embodiments are also had.Please refer to Fig. 4, is the circuit framework figure of the power supply circuits of second embodiment of the invention.With the first embodiment unlike, as the acceleration compensating unit 131 in Fig. 4 is arranged between the feedback output node P of feedback circuit 12 and the 3rd output end vo ut3, it is also carry out Acceleration of starting compensating unit 131 according to control signal (system control), and then change feedback output node P electric current over the ground, thus the conducting situation changing optical coupler 17 carrys out control impuls width modulation circuit 15 couples of DC input voitage V
0the adjustment of size, its concrete principle with the first embodiment, therefore does not repeat at this.
In addition, please refer to Fig. 5, is the circuit framework figure of the power supply circuits of third embodiment of the invention.With the first embodiment unlike, as the acceleration compensating unit 132 in Fig. 4 is arranged between the series connection node G of the first output end vo ut1 and the first resistance R4 and the second resistance R5, it is that control signal (system control) carrys out Acceleration of starting compensating unit 131 equally, electric current on the one hand in the corresponding output loop of adjustment the first secondary coil 111, remain on the other hand and change feedback output node P electric current over the ground, thus the conducting situation changing optical coupler 17 carrys out control impuls width modulation circuit 15 couples of DC input voitage V
0the adjustment of size, its concrete principle with the first embodiment, therefore does not repeat at this.By the circuit structure of such as Fig. 5, pulse width modulation circuit 15 couples of DC input voitage V can be made
0the adjustment of size is stablized more gently.
In sum, the present invention is utilized to have the power supply circuits of voltage acceleration compensation, when there is acute variation in load end, the response speed of feedback circuit still can be accelerated by accelerating compensating unit, and then adjust pulse width modulation circuit fast, make output voltage can tackle the change of load end timely, thus it is more stable to allow the voltage of whole system export.
The present invention is described by above-mentioned related embodiment, but above-described embodiment is only enforcement example of the present invention.Must it is noted that the embodiment disclosed limit the scope of the invention.On the contrary, change done without departing from the spirit and scope of the present invention and retouching, all belong to scope of patent protection of the present invention.
Claims (14)
1. there are power supply circuits for voltage acceleration compensation, it is characterized in that comprising:
DC power supply, in order to provide a DC input voitage;
Transformer, there is primary coil, the first secondary coil and second subprime coil, this primary coil connects this DC power supply in order to accept this DC input voitage, this first secondary coil and this second subprime coil are then in order to respond to this DC input voitage, corresponding output the first output voltage and the second output voltage, powering load;
Feedback unit, is connected to this second subprime coil, in order to sampled feedback signal and output feedack voltage;
Accelerate compensating unit, be connected with this feedback unit, in order to accelerate the change of this feedback voltage;
Control module, is connected to this acceleration compensating unit, in order to respond the change of this first output voltage to provide a Continuity signal to start this acceleration compensating unit;
Pulse width modulation circuit, is arranged between this transformer and this feedback unit, controls according to the change of this feedback voltage this DC input voitage size sending into this this primary coil of transformer.
2. power supply circuits as claimed in claim 1, is characterized in that also comprising a control switch, and connect this transformer and this pulse width modulation circuit, whether it controls this control switch conducting by the running status of this pulse width modulation circuit.
3. power supply circuits as claimed in claim 1, it is characterized in that also comprising an optical coupler, connect this pulse width modulation circuit and this feedback unit, wherein, the light effect LED that waits in this optical coupler connects this feedback unit, and the equivalent phototransistor in this optical coupler connects this pulse width modulation circuit.
4. power supply circuits as claimed in claim 3, it is characterized in that this feedback unit comprises one the 3rd switch and a feedback output node, the 3rd switch comprises:
First end, connects this feedback output node of this feedback unit;
Second end, connects this feedback signal, and this feedback signal is in order to control the conducting state of the 3rd switch;
And the 3rd end, be connected with earth point.
5. power supply circuits as claimed in claim 4, it is characterized in that also comprising the first rectifier cell, the anode of this first rectifier cell connects this second subprime coil, its negative electrode connects this feedback unit, this feedback unit also comprises the first resistance and second resistance of series connection mutually, wherein, one end of this first resistance connects the negative electrode of this first rectifier cell, one end of this second resistance connects the 3rd end of the 3rd switch, and this second end of the 3rd switch is connected to the series connection node of this first resistance and the second resistance, this feedback signal is the magnitude of voltage of this series connection node.
6. power supply circuits as claimed in claim 5, is characterized in that the 3rd switch is three end adjustable shunt reference sources.
7. power supply circuits as claimed in claim 6, it is characterized in that also comprising the first filtering energy-storage travelling wave tube, the negative electrode of this first rectifier cell connects one end of this first filtering energy-storage units, the other end ground connection of this first filtering energy-storage units.
8. power supply circuits as claimed in claim 7, it is characterized in that this feedback unit also comprises one the 3rd output, this acceleration compensating unit is connected between the 3rd output and this feedback output node.
9. power supply circuits as claimed in claim 7, it is characterized in that also comprising the second rectifier cell and the 3rd filtering energy-storage travelling wave tube, the anode of this second rectifier cell connects this first secondary coil, its negative electrode connects one end and one first output of the 3rd filtering energy-storage units, the other end ground connection of the 3rd filtering energy-storage units, wherein, this first output is in order to export this first output voltage, and this acceleration compensating unit is connected between the negative electrode of this second rectifier cell and this series connection node.
10. power supply circuits as claimed in claim 7, it is characterized in that also comprising isolated component and the second filtering energy-storage units, the anode of this isolated component is connected with the negative electrode of this first rectifier cell, its negative electrode connects one end and one second output of this second filtering energy-storage units, the other end ground connection of this second filtering energy-storage units, this second output is in order to export this second output voltage.
11. power supply circuits as claimed in claim 10, it is characterized in that this control module comprises a second switch, this second switch comprises:
First end, connects a control signal, and this control signal is in order to control the conducting state of this second switch;
Second end, is connected with earth point; And
3rd end, connects this acceleration compensating unit.
12. power supply circuits as claimed in claim 11, it is characterized in that when this first output voltage is lower than a reference voltage, this acceleration compensating unit can change this feedback output node of this feedback circuit immediately to earth-current, thus the conducting state changing this optical coupler is cut-off state, when this pulse width modulation circuit detecting becomes cut-off state to this optical coupler, this pulse width modulation circuit then improves this DC input voitage size sending into transformer.
13. power supply circuits as claimed in claim 12, it is characterized in that this acceleration compensating unit comprises one first switch and one the 3rd resistance, this first switch comprises:
First end, connects the 3rd end of this second switch, in order to receive this Continuity signal;
Second end, connects the negative electrode of this first rectifier cell; And
3rd end, connects one end of the 3rd resistance;
Wherein, the other end ground connection of the 3rd resistance, when this second switch conducting, namely this Continuity signal this first end to this first switch can be produced, make this first switch conduction, the 3rd resistance carries out dividing potential drop, thus changes the series connection node voltage of this first resistance and this second resistance.
14. power supply circuits as claimed in claim 13, is characterized in that this first switch is enhancement mode field effect transistor.
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| CN201310001464.XA CN103095144B (en) | 2013-01-07 | 2013-01-07 | Power supply circuit provided with voltage acceleration compensation |
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| CN107968575A (en) * | 2017-12-25 | 2018-04-27 | 广州金升阳科技有限公司 | A kind of feedback control circuit |
| TWI706625B (en) * | 2020-04-09 | 2020-10-01 | 義隆電子股份有限公司 | Inductive electronic identification device and power supply compensation circuit of the same |
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| CN101546204A (en) * | 2008-03-25 | 2009-09-30 | 联咏科技股份有限公司 | Voltage generator with dynamic resistance feedback control |
| CN201947046U (en) * | 2010-11-26 | 2011-08-24 | 上海电机学院 | Switch power supply with backup battery for power supply |
| CN202424526U (en) * | 2011-11-17 | 2012-09-05 | 常州能动电子科技有限公司 | High-voltage input power system |
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|---|---|---|---|---|
| JP2004147452A (en) * | 2002-10-25 | 2004-05-20 | Canon Inc | Gate drive circuit |
| TWI363945B (en) * | 2008-03-11 | 2012-05-11 | Novatek Microelectronics Corp | Voltage generator having a dynamic resistors feedback control |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101546204A (en) * | 2008-03-25 | 2009-09-30 | 联咏科技股份有限公司 | Voltage generator with dynamic resistance feedback control |
| CN201947046U (en) * | 2010-11-26 | 2011-08-24 | 上海电机学院 | Switch power supply with backup battery for power supply |
| CN202424526U (en) * | 2011-11-17 | 2012-09-05 | 常州能动电子科技有限公司 | High-voltage input power system |
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