CN103941794A - Series connection type transistor voltage stabilizing circuit with differential amplification function - Google Patents
Series connection type transistor voltage stabilizing circuit with differential amplification function Download PDFInfo
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- CN103941794A CN103941794A CN201310609886.5A CN201310609886A CN103941794A CN 103941794 A CN103941794 A CN 103941794A CN 201310609886 A CN201310609886 A CN 201310609886A CN 103941794 A CN103941794 A CN 103941794A
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Abstract
The invention discloses a series connection type transistor voltage stabilizing circuit with a differential amplification function. The voltage stabilizing circuit comprises a reference voltage module, an adjusting module, a partial pressure sampling module and a differential amplification module. In the using process, due to certain reasons, input voltages or load resistance is changed, so that output voltages rise or lower. The sampling voltage of a first sampling resistor and the sampling voltage of a second sampling resistor synchronously rise or lower, the differential amplification module amplifies the difference of the sampling voltages and a reference voltage and transmits the variation to a transistor, the base electrode of a transistor is affected so that the base electrode currents of the transistor lower or rise, the variation of the base electrode currents leads the voltages between the collector electrode and the emitting electrode of the transistor to rise or lower, and finally the output voltages and the reference voltage are consistent to achieve dynamic balance. The differential amplification module is additionally arranged so that the small variation of the output voltages can be quickly responded, and the voltage stabilizing performance of the entire circuit is greatly improved.
Description
Technical field
The present invention relates to field of power electronics, relate in particular to the transistor stabilized circuit of a kind of tandem type with differential amplification function.
Background technology
The transistor stabilized circuit of tandem type is the one in direct current regulation circuit, and the voltage of components and parts after as Switching Power Supply rectifying and wave-filtering is unsettled voltage, and in the time of line voltage or load variations, this voltage all can change, and ripple voltage is large again; Therefore after rectifying and wave-filtering, also must pass through mu balanced circuit, just can make output voltage stablize in certain scope constant, at present, mainly adopt the transistor stabilized circuit of tandem type to carry out voltage stabilizing to it.
The transistor stabilized circuit of general tandem type is taking stabilivolt mu balanced circuit as basis, utilize transistorized electric current amplification, increase load current, in circuit, introduce degree of depth voltage negative feedback and make output voltage stabilization, this mu balanced circuit have advantages of that cost is low, simple in structure; But slow in reacting to output voltage subtle change, voltage regulation result is bad, can only be used in less demanding circuit.
Summary of the invention
For the weak point existing in above-mentioned technology, the invention provides a kind of circuit simple, use safety, action response fast and control the accurately high transistor stabilized circuit of the tandem type with differential amplification function, this circuit can be made quick response to the subtle change of output voltage, and the voltage regulation performance of whole circuit is improved greatly.
For achieving the above object, the invention provides the transistor stabilized circuit of a kind of tandem type with differential amplification function, comprise
Reference voltage module, harmonizes as a comparison for circuit provides stable reference voltage;
Adjusting module, described adjusting module is connected with reference voltage module, and adjusting module is provided with transistor, and described transistorized emitter is connected with power input, and the electric current of described transistorized collector is to output terminal, and powering load;
Dividing potential drop sampling module, this dividing potential drop sampling module comprises the first sampling resistor and the second sampling resistor, described the first sampling resistor is connected with output terminal with after the second sampling resistor series connection, and the output voltage of output terminal is carried out to dividing potential drop and sample and obtain sampled voltage;
Differential amplification module, amplifies the difference of sampled voltage and reference voltage and controls adjusting module, and this differential amplification module comprises the first triode, the second triode and the 3rd resistance; Described the first sampling resistor is connected with the base stage of the first triode, described the second sampling resistor is connected with the emitter of the second triode by the 3rd resistance, the emitter of described the first triode is connected with the emitter of the second triode, the collector of described the first triode is connected with transistorized collector, and the collector of described the second triode is connected with transistorized base stage.
Wherein, described reference voltage module comprises voltage stabilizing diode and current-limiting resistance; One end of described current-limiting resistance is connected with power input, one end ground connection of described voltage stabilizing diode, and the common port of described current-limiting resistance and voltage stabilizing diode is connected to the base stage of the second triode.
Wherein, described dividing potential drop sampling module also comprises the 5th resistance and the 6th resistance of series connection, and described the 5th resistance is connected with output terminal, and described the 6th resistance respectively base stage of the first triode is connected with the first sampling resistor.
Wherein, described adjusting module also comprises the 7th resistance, and described the 7th resistance is connected between transistorized base stage and the 4th resistance.
Wherein, described circuit also comprises peripheral protection module, and described peripheral protection module is connected between dividing potential drop sampling module and output terminal.
Wherein, described peripheral protection module comprises filter capacitor in parallel and the first electric capacity; One end of described filter capacitor is connected with one end of the 5th resistance, and the other end of described filter capacitor is connected with one end of the second sampling resistor, and one end of described the first electric capacity is connected to output terminal, the other end ground connection of described the first electric capacity.
The invention has the beneficial effects as follows: compared with prior art, the transistor stabilized circuit of tandem type with differential amplification function provided by the invention, when in use making for a certain reason input voltage or pull-up resistor change, thereby cause output voltage to raise or reduce, the synchronous rising or reduction of sampled voltage of the first sampling resistor and the second sampling resistor, differential amplification module is amplified the difference of sampled voltage and reference voltage, and this variation is transferred to transistor, and affect transistorized base stage, transistorized base current is reduced or raise, the variation of base current causes the voltage between transistorized collector and emitter raise or reduce, finally make output voltage consistent with reference voltage, reach mobile equilibrium, can make quick response to the subtle change of output voltage by increasing differential amplification module, the voltage regulation performance of whole circuit is improved greatly.The present invention has the features such as circuit is simple, production cost is low, simple operation, highly sensitive, action response fast, control accurate height, stablizing effect is good, applicability is strong.
Brief description of the drawings
Fig. 1 is the fundamental diagram of the transistor stabilized circuit of tandem type with differential amplification function of the present invention;
Fig. 2 is that in prior art, input voltage is 20V, the oscillogram that output voltage is 16.6V;
Fig. 3 is that in prior art, input voltage is 25V, the oscillogram that output voltage is 16.6V;
Fig. 4 is that in prior art, input voltage is 30V, the oscillogram that output voltage is 16.6V;
Fig. 5 is that in the present invention, input voltage is 16.6V, the oscillogram that output voltage is 16.6V.
Main element symbol description is as follows:
10, reference voltage module 11, adjusting module
12, dividing potential drop sampling module 13, differential amplification module
14, peripheral protection module
Embodiment
In order more clearly to explain the present invention, below in conjunction with accompanying drawing, the present invention is further described.
Refer to Fig. 1, the transistor stabilized circuit of the tandem type with differential amplification function of the present invention, comprises reference voltage module 10, adjusting module 11, dividing potential drop sampling module 12 and differential amplification module 13;
Reference voltage module 10, harmonizes as a comparison for circuit provides stable reference voltage;
Adjusting module 11, adjusting module 11 is connected with reference voltage module 10, and adjusting module 11 is provided with transistor Q, and the emitter of transistor Q is connected with power input, and the electric current of the collector of transistor Q is to output terminal, and powering load; Transistor Q is as adjusting pipe work in linear amplification region, the base current of this transistor Q is controlled by the output of comparison amplifier section, the change of the base current of transistor Q is raise or reduce, and can make the voltage synchronous change between transistor Q collector current and emitter is raise or reduce;
Dividing potential drop sampling module 12, this dividing potential drop sampling module 12 comprises the first sampling resistor R1 and the second sampling resistor R2, the first sampling resistor R1 is connected with output terminal with after the second sampling resistor R2 series connection, and the output voltage of output terminal is carried out to dividing potential drop and sample and obtain sampled voltage;
Differential amplification module 13, amplifies the difference of sampled voltage and reference voltage and controls adjusting module 11, and this differential amplification module 13 comprises the first triode Q1, the second triode Q2 and the 3rd resistance R 3; The first sampling resistor R1 is connected with the base stage of the first triode Q1, the second sampling resistor R2 is connected with the emitter of the second triode Q2 by the 3rd resistance R 3, the emitter of the first triode Q1 is connected with the emitter of the second triode Q2, the collector of the first triode Q1 is connected with the collector of transistor Q, and the collector of the second triode Q2 is connected with the base stage of transistor Q.
Compared to the situation of prior art, the transistor stabilized circuit of tandem type with differential amplification function provided by the invention, when in use making for a certain reason input voltage VIN or pull-up resistor change, thereby cause output voltage VO UT to raise or reduce, the synchronous rising or reduction of sampled voltage of the first sampling resistor R1 and the second sampling resistor R2, differential amplification module 13 is amplified the difference of sampled voltage and reference voltage, and this variation is transferred to transistor Q, and affect the base stage of transistor Q, make the base current of transistor Q reduce or raise, the variation of base current causes the voltage between the collector and emitter of transistor Q raise or reduce, finally make output voltage VO UT consistent with reference voltage, reach mobile equilibrium, can make quick response to the subtle change of output voltage by increasing differential amplification module 13, the voltage regulation performance of whole circuit is improved greatly.The present invention has the features such as circuit is simple, production cost is low, simple operation, highly sensitive, action response fast, control accurate height, stablizing effect is good, applicability is strong.
In the present embodiment, reference voltage module 10 comprises voltage stabilizing diode Z1 and current-limiting resistance R4; One end of current-limiting resistance R4 is connected with power input, one end ground connection GND of voltage stabilizing diode Z1, and the common port of current-limiting resistance R4 and voltage stabilizing diode Z1 is connected to the base stage of the second triode Q2.In this module, by voltage stabilizing diode Z1 and current-limiting resistance R4, the reference voltage in circuit is carried out to voltage stabilizing and current limliting, improved the accuracy of voltage regulation result and magnitude of voltage.
In the present embodiment, dividing potential drop sampling module 12 also comprises that the 5th resistance R 5 of series connection and the 6th resistance R 6, the five resistance R 5 are connected with output terminal, being connected with base stage and the first sampling resistor R1 of the first triode Q1 respectively of the 6th resistance R 6.This dividing potential drop sampling module 12 forms dividing potential drop sampling by the first sampling resistor R1, the second sampling resistor R2, the 5th resistance R 5 and the 6th resistance, output voltage VO UT is divided into a part as sampled voltage, and delivers in differential amplification module 13.
In the present embodiment, adjusting module 11 also comprises that the 7th resistance R 7, the seven resistance R 7 are connected between the base stage and the 4th resistance R 4 of transistor Q.The 7th resistance R 7 is adjusted transistor Q in real time as adjusting components and parts.Certainly, be originally not limited to and adopt resistance to adjust, can also adopt other components and parts, if to adjusting the change of components and parts, all fall into protection scope of the present invention.
In the present embodiment, circuit also comprises peripheral protection module 14, and peripheral protection module 14 is connected between dividing potential drop sampling module 12 and output terminal.Peripheral protection module 14 comprises filter capacitor E1 in parallel and the first capacitor C 1; One end of filter capacitor E1 is connected with one end of the 5th resistance R 5, and the other end of filter capacitor E1 is connected with one end of the second sampling resistor R2, and one end of the first capacitor C 1 is connected to output terminal, the other end ground connection GND of the first capacitor C 1.Can further protect the duty of output terminal load and dividing potential drop sampling module 12 by peripheral protection module 14.
The principle of work of this circuit is that it mainly has following two kinds of duties:
State one: in use, make for a certain reason input voltage or pull-up resistor change, thereby cause output voltage VO UT to raise, sampled voltage synchronously raises, differential amplification module 13 is amplified the difference of sampled voltage and reference voltage, and this variation is transferred to transistor Q, and affect the base stage of transistor Q, the base current of transistor Q is reduced, the reduction of the variation of the base current of transistor Q causes the voltage between the collector and emitter of transistor Q to raise, and makes output voltage VO UT voltage finally reach balance;
State two: in use, make for a certain reason input voltage or pull-up resistor change, thereby cause output voltage VO UT to reduce, sampled voltage synchronously reduces, differential amplification module 13 is amplified the difference of sampled voltage and reference voltage, and this variation is transferred to transistor Q, and affect the base stage of transistor Q, the base current of transistor Q is raise, the reduction of the variation of the base current of transistor Q causes the lower voltage between the collector and emitter of transistor Q, makes output voltage VO UT voltage finally reach balance.
Please further consult Fig. 2-4, for adopting mu balanced circuit of the prior art, experiment records under different input voltages, the numerical value of output voltage, from these three figure, can find out, although the variation of 5V occurs input voltage, final output voltage is 16.6V, and this circuit is slow in reacting to output voltage subtle change; Referring again to Fig. 5, in the time that input voltage VIN linearity raises or reduces, the voltage VCE in transistor Q between emitter and collector is also being synchronizeed linear rising or reduction, and the difference of two voltages is a constant 16.6V, for the voltage of the desired output of circuit, finally reach a mobile equilibrium.Further prove that by this experiment this circuit dynamic response is fast, control accuracy is high.
Disclosed is above only several specific embodiment of the present invention, but the present invention is not limited thereto, and the changes that any person skilled in the art can think of all should fall into protection scope of the present invention.
Claims (6)
1. the transistor stabilized circuit of the tandem type with differential amplification function, is characterized in that, comprising:
Reference voltage module, harmonizes as a comparison for circuit provides stable reference voltage;
Adjusting module, described adjusting module is connected with reference voltage module, and adjusting module is provided with transistor, and described transistorized emitter is connected with power input, and the electric current of described transistorized collector is to output terminal, and powering load;
Dividing potential drop sampling module, this dividing potential drop sampling module comprises the first sampling resistor and the second sampling resistor, described the first sampling resistor is connected with output terminal with after the second sampling resistor series connection, and the output voltage of output terminal is carried out to dividing potential drop and sample and obtain sampled voltage;
Differential amplification module, amplifies the difference of sampled voltage and reference voltage and controls adjusting module, and this differential amplification module comprises the first triode, the second triode and the 3rd resistance; Described the first sampling resistor is connected with the base stage of the first triode, described the second sampling resistor is connected with the emitter of the second triode by the 3rd resistance, the emitter of described the first triode is connected with the emitter of the second triode, the collector of described the first triode is connected with transistorized collector, and the collector of described the second triode is connected with transistorized base stage.
2. the transistor stabilized circuit of the tandem type with differential amplification function according to claim 1, is characterized in that, described reference voltage module comprises voltage stabilizing diode and current-limiting resistance; One end of described current-limiting resistance is connected with power input, one end ground connection of described voltage stabilizing diode, and the common port of described current-limiting resistance and voltage stabilizing diode is connected to the base stage of the second triode.
3. the transistor stabilized circuit of the tandem type with differential amplification function according to claim 1, it is characterized in that, described dividing potential drop sampling module also comprises the 5th resistance and the 6th resistance of series connection, described the 5th resistance is connected with output terminal, and described the 6th resistance respectively base stage of the first triode is connected with the first sampling resistor.
4. the transistor stabilized circuit of the tandem type with differential amplification function according to claim 1, is characterized in that, described adjusting module also comprises the 7th resistance, and described the 7th resistance is connected between transistorized base stage and the 4th resistance.
5. according to the transistor stabilized circuit of the tandem type with differential amplification function described in claim 1-4 any one, it is characterized in that, described circuit also comprises peripheral protection module, and described peripheral protection module is connected between dividing potential drop sampling module and output terminal.
6. the transistor stabilized circuit of the tandem type with differential amplification function according to claim 5, is characterized in that, described peripheral protection module comprises filter capacitor in parallel and the first electric capacity; One end of described filter capacitor is connected with one end of the 5th resistance, and the other end of described filter capacitor is connected with one end of the second sampling resistor, and one end of described the first electric capacity is connected to output terminal, the other end ground connection of described the first electric capacity.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310609886.5A CN103941794A (en) | 2013-11-27 | 2013-11-27 | Series connection type transistor voltage stabilizing circuit with differential amplification function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310609886.5A CN103941794A (en) | 2013-11-27 | 2013-11-27 | Series connection type transistor voltage stabilizing circuit with differential amplification function |
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| CN201310609886.5A Pending CN103941794A (en) | 2013-11-27 | 2013-11-27 | Series connection type transistor voltage stabilizing circuit with differential amplification function |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105258810A (en) * | 2015-11-23 | 2016-01-20 | 成都科瑞信科技有限责任公司 | Novel temperature alarm system of eddy current retarder |
| CN105444902A (en) * | 2015-11-23 | 2016-03-30 | 成都科瑞信科技有限责任公司 | Eddy current retarder temperature alarm system based on filtering circuit |
| CN105466581A (en) * | 2015-11-23 | 2016-04-06 | 成都科瑞信科技有限责任公司 | Filtering-type electric eddy current retarder temperature alarm system based on coupling amplification |
| CN106200746A (en) * | 2016-08-11 | 2016-12-07 | 东莞博力威电池有限公司 | A kind of linear series mu balanced circuit |
| CN106325349A (en) * | 2016-09-20 | 2017-01-11 | 广西大学 | Serial-connection type voltage-stabilizing circuit with amplifying link |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105258810A (en) * | 2015-11-23 | 2016-01-20 | 成都科瑞信科技有限责任公司 | Novel temperature alarm system of eddy current retarder |
| CN105444902A (en) * | 2015-11-23 | 2016-03-30 | 成都科瑞信科技有限责任公司 | Eddy current retarder temperature alarm system based on filtering circuit |
| CN105466581A (en) * | 2015-11-23 | 2016-04-06 | 成都科瑞信科技有限责任公司 | Filtering-type electric eddy current retarder temperature alarm system based on coupling amplification |
| CN106200746A (en) * | 2016-08-11 | 2016-12-07 | 东莞博力威电池有限公司 | A kind of linear series mu balanced circuit |
| CN106200746B (en) * | 2016-08-11 | 2018-06-08 | 东莞博力威电池有限公司 | A kind of linear series regulator circuit |
| CN106325349A (en) * | 2016-09-20 | 2017-01-11 | 广西大学 | Serial-connection type voltage-stabilizing circuit with amplifying link |
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Application publication date: 20140723 |
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