CN109375690A - A kind of tandem type switch voltage-stabilizing circuit - Google Patents
A kind of tandem type switch voltage-stabilizing circuit Download PDFInfo
- Publication number
- CN109375690A CN109375690A CN201811212283.0A CN201811212283A CN109375690A CN 109375690 A CN109375690 A CN 109375690A CN 201811212283 A CN201811212283 A CN 201811212283A CN 109375690 A CN109375690 A CN 109375690A
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- China
- Prior art keywords
- circuit
- voltage
- triode
- tandem type
- filter
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Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
Abstract
The invention discloses a kind of tandem type switch voltage-stabilizing circuits, including comparing amplifying circuit, control circuit, switch adjustment circuit, LC filter circuit, sample circuit, Input voltage terminal and output voltage terminal, the Input voltage terminal, switch adjustment circuit, LC filter circuit and output voltage terminal are sequentially connected, the output voltage terminal is additionally coupled to the sample circuit, the sample circuit feedback sample voltage is to comparing amplifying circuit, the relatively amplifying circuit is connected to the control circuit, the control circuit is connected to the control terminal of the switch adjustment circuit, triode for adjusting the switch adjustment circuit of output voltage operates mainly in saturation conduction and cut-off two states, conducting electric current all very littles when tube voltage drop and conducting when due to saturation conduction, pipe consumption is smaller, power-efficient is higher, therefore fever is also less, without matching Standby huge radiator, it is small in size, it is light-weight.
Description
Technical field
The present invention relates to electronic circuit field, especially a kind of tandem type switch voltage-stabilizing circuit.
Background technique
In electronic circuit, the DC power supply power supply of voltage stabilization is usually required.The composition one of small-power regulated power supply
As include power transformer, rectification circuit, filter circuit and voltage regulator circuit etc..Power transformer is by the electricity of AC network 220V
Buckling is required voltage value, then alternating voltage is become to the DC voltage of pulsation by rectification circuit, then passes through filtering
Circuit filters out the ripple in DC voltage, and voltage ripple of power network, load and temperature change are finally eliminated by voltage regulator circuit to defeated
The influence of voltage out.
Serial Feedback formula voltage regulator circuit is being loaded since the triode operation for adjusting voltage is in linear amplification region
When electric current is bigger, the collector dissipation of triode is quite big, and power-efficient is lower, and generally 40%-60% is also needed sometimes
It is equipped with huge radiator.
Summary of the invention
To solve the above problems, can be improved electricity the purpose of the present invention is to provide a kind of tandem type switch voltage-stabilizing circuit
Source efficiency, it is small in size without being equipped with huge radiator, it is light-weight.
Technical solution used by the present invention solves the problems, such as it is:
A kind of tandem type switch voltage-stabilizing circuit, including compare amplifying circuit, control circuit, switch adjustment circuit, LC filtering
Circuit, sample circuit, Input voltage terminal and output voltage terminal, the Input voltage terminal, switch adjustment circuit, LC filter circuit and
Output voltage terminal is sequentially connected, and the output voltage terminal is additionally coupled to the sample circuit, the sample circuit feedback sample electricity
It is depressed into and compares amplifying circuit, the relatively amplifying circuit is connected to the control circuit, and the control circuit is connected to described open
Close the control terminal of adjustment circuit.
Further, the switch adjustment circuit includes triode and diode, and the Input voltage terminal is connected to described three
The collector of pole pipe, the control circuit are connected to the base stage of the triode, and the emitter of the triode is respectively connected to
The diode and the LC filter circuit, the diode ground connection.
Further, the LC filter circuit includes filter inductance and filter capacitor, and described filter inductance one end is connected to institute
The emitter of triode is stated, the other end is respectively connected to filter capacitor and the output voltage terminal, the filter capacitor ground connection.
Further, the sample circuit includes first resistor and second resistance, the output voltage terminal connection described first
Resistance, the first resistor connect the second resistance, the second resistance ground connection, the company of the first resistor and second resistance
Contact draws feedback voltage end, and the feedback voltage end is connected to the relatively amplifying circuit.
Further, the relatively amplifying circuit includes comparison amplifier and reference voltage circuit, and the feedback voltage end connects
It is connected to the reverse side of the comparison amplifier, the reference voltage circuit is connected to the in-phase end of the comparison amplifier and output
Reference voltage gives the comparison amplifier, and the output end of the comparison amplifier is connected to the control circuit.
Further, the control circuit includes the triangular wave electricity of comparator and the triangle wave voltage for generating fixed frequency
Generator is pressed, the output end of the comparison amplifier is connected to the in-phase end of the comparator, the triangle wave voltage generator
Output end be connected to the reverse side of the comparator and export triangle wave voltage to the comparator, the output of the comparator
End is connected to the base stage of the triode.
Further, the triode is NPN type BJT.
The beneficial effects of the present invention are: a kind of tandem type switch voltage-stabilizing circuit that the present invention uses, for adjusting output electricity
The triode of the switch adjustment circuit of pressure operates mainly in saturation conduction and cut-off two states, pipe pressure when due to saturation conduction
Conducting electric current all very littles when drop and conducting, pipe consumption is smaller, and power-efficient is higher, therefore it is also less to generate heat, huge without being equipped with
Radiator, it is small in size, it is light-weight.
Detailed description of the invention
The invention will be further described with example with reference to the accompanying drawing.
Fig. 1 is a kind of circuit diagram of tandem type switch voltage-stabilizing circuit of the present invention.
Specific embodiment
Referring to Fig.1, a kind of tandem type switch voltage-stabilizing circuit of the invention, including compare amplifying circuit 1, control circuit 2, open
Close adjustment circuit 3, LC filter circuit 4, sample circuit 5, Input voltage terminal Vi and output voltage terminal Vo, the Input voltage terminal
Vi, switch adjustment circuit 3, LC filter circuit 4 and output voltage terminal Vo are sequentially connected, and the output voltage terminal Vo is additionally coupled to institute
Sample circuit 5 is stated, the 5 feedback sample voltage of sample circuit is connected to amplifying circuit 1, the relatively amplifying circuit 1 is compared
The control circuit 2, the control circuit 2 are connected to the control terminal of the switch adjustment circuit 3.
Specifically, the switch adjustment circuit 3 includes triode T1 and diode D1, and the Input voltage terminal Vi is connected to
The collector of the triode T1, the control circuit 2 are connected to the base stage of the triode T1, the transmitting of the triode T1
Pole is respectively connected to the diode D1 and the LC filter circuit 4, the diode D1 ground connection.
Specifically, the LC filter circuit 4 includes filter inductance L1 and filter capacitor C1, and the one end the filter inductance L1 connects
It is connected to the emitter of the triode T1, the other end is respectively connected to filter capacitor C1 and the output voltage terminal Vo, the filter
Wave capacitor C1 ground connection.
Specifically, the sample circuit 5 includes first resistor R1 and second resistance R2, output voltage terminal Vo connection institute
State first resistor R1, the first resistor R1 connection second resistance R2, the second resistance R2 ground connection, the first resistor
The tie point of R1 and second resistance R2 draw feedback voltage end Vf, and the feedback voltage end Vf is connected to the relatively amplifying circuit
1。
Specifically, the relatively amplifying circuit 1 includes comparison amplifier A and reference voltage circuit 11, the feedback voltage
End Vf is connected to the reverse side of the comparison amplifier A, and the reference voltage circuit 11 is connected to the same of the comparison amplifier A
Simultaneously outputting reference voltage Vref gives the comparison amplifier A at phase end, and the output end of the comparison amplifier A is connected to the control
Circuit 2.
Specifically, the control circuit 2 includes the triangular wave of comparator C and the triangle wave voltage for generating fixed frequency
Voltage generator 21, the output end of the comparison amplifier A are connected to the in-phase end of the comparator C, the triangle wave voltage
The output end of generator 21 is connected to the reverse side of the comparator C and exports triangle wave voltage to the comparator C, the ratio
Output end compared with device C is connected to the base stage of the triode T1.Specifically, the triode T1 is NPN type BJT.
When the voltage increase of Input voltage terminal Vi causes the voltage increase of output voltage terminal Vo, the electricity of feedback voltage end Vf
Pressure is greater than the voltage of outputting reference voltage Vref, and the output voltage of comparison amplifier A is negative value, the output electricity of comparison amplifier A
Compared with the output voltage of triangle wave voltage generator 21, the output end of comparator C is exported pressure to the base stage of triode T1
Waveform signal duty ratio changes, and declines output voltage；Triode T1 for adjusting output voltage operates mainly in full
With on and off two states, conducting electric current all very littles when tube voltage drop and conducting when due to saturation conduction, pipe consumption is smaller,
Power-efficient is higher, therefore it is also less to generate heat, small in size without being equipped with huge radiator, light-weight.
The above, only presently preferred embodiments of the present invention, the invention is not limited to above embodiment, as long as
It reaches technical effect of the invention with identical means, all should belong to protection scope of the present invention.
Claims (7)
1. a kind of tandem type switch voltage-stabilizing circuit, which is characterized in that including comparing amplifying circuit (1), control circuit (2), switch
Adjustment circuit (3), LC filter circuit (4), sample circuit (5), Input voltage terminal (Vi) and output voltage terminal (Vo), the input
Voltage end (Vi), switch adjustment circuit (3), LC filter circuit (4) and output voltage terminal (Vo) are sequentially connected, the output voltage
End (Vo) is additionally coupled to the sample circuit (5), and sample circuit (5) the feedback sample voltage is to comparing amplifying circuit (1), institute
It states and compares amplifying circuit (1) and be connected to the control circuit (2), the control circuit (2) is connected to the switch adjustment circuit
(3) control terminal.
2. a kind of tandem type switch voltage-stabilizing circuit according to claim 1, which is characterized in that the switch adjustment circuit
It (3) include triode (T1) and diode (D1), the Input voltage terminal (Vi) is connected to the collector of the triode (T1),
The control circuit (2) is connected to the base stage of the triode (T1), and the emitter of the triode (T1) is respectively connected to institute
State diode (D1) and the LC filter circuit (4), diode (D1) ground connection.
3. a kind of tandem type switch voltage-stabilizing circuit according to claim 2, which is characterized in that the LC filter circuit (4)
Including filter inductance (L1) and filter capacitor (C1), described filter inductance (L1) one end is connected to the transmitting of the triode (T1)
Pole, the other end are respectively connected to filter capacitor (C1) and the output voltage terminal (Vo), filter capacitor (C1) ground connection.
4. a kind of tandem type switch voltage-stabilizing circuit according to claim 3, which is characterized in that sample circuit (5) packet
Including first resistor (R1) and second resistance (R2), the output voltage terminal (Vo) connects the first resistor (R1), and described first
Resistance (R1) connects the second resistance (R2), second resistance (R2) ground connection, the first resistor (R1) and second resistance
(R2) tie point draws feedback voltage end (Vf), and the feedback voltage end (Vf) is connected to comparison amplifying circuit (1).
5. a kind of tandem type switch voltage-stabilizing circuit according to claim 4, which is characterized in that the relatively amplifying circuit
It (1) include comparison amplifier (A) and reference voltage circuit (11), the feedback voltage end (Vf) is connected to the comparison amplifier
(A) reverse side, the reference voltage circuit (11) are connected to the in-phase end and outputting reference voltage of the comparison amplifier (A)
(Vref) comparison amplifier (A) is given, the output end of the comparison amplifier (A) is connected to the control circuit (2).
6. a kind of tandem type switch voltage-stabilizing circuit according to claim 5, which is characterized in that control circuit (2) packet
The triangle wave voltage generator (21) of comparator (C) and the triangle wave voltage for generating fixed frequency is included, it is described relatively to amplify
The output end of device (A) is connected to the in-phase end of the comparator (C), the output end connection of the triangle wave voltage generator (21)
To the comparator (C) reverse side and export triangle wave voltage to the comparator (C), the output end of the comparator (C)
It is connected to the base stage of the triode (T1).
7. a kind of tandem type switch voltage-stabilizing circuit according to claim 2, which is characterized in that the triode (T1) is
NPN type BJT.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811212283.0A CN109375690A (en) | 2018-10-17 | 2018-10-17 | A kind of tandem type switch voltage-stabilizing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811212283.0A CN109375690A (en) | 2018-10-17 | 2018-10-17 | A kind of tandem type switch voltage-stabilizing circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109375690A true CN109375690A (en) | 2019-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811212283.0A Pending CN109375690A (en) | 2018-10-17 | 2018-10-17 | A kind of tandem type switch voltage-stabilizing circuit |
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| CN (1) | CN109375690A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11695479B2 (en) | 2019-03-06 | 2023-07-04 | Consorzio Nazionale Interuniversitario Per Le Telecomunicazioni | Transmitters and receivers |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2282698Y (en) * | 1996-02-05 | 1998-05-27 | 辜明钟 | Internal control type switch voltage stabilizer |
| CN2927487Y (en) * | 2006-01-19 | 2007-07-25 | 海信集团有限公司 | DC converter with wide inputting-voltage range |
| CN104793677A (en) * | 2014-01-17 | 2015-07-22 | 瑞萨电子株式会社 | Semiconductor integrated circuit and method for operating same |
| CN104852577A (en) * | 2015-06-10 | 2015-08-19 | 灿瑞半导体(上海)有限公司 | Step-down DC converter |
| CN204925859U (en) * | 2015-07-20 | 2015-12-30 | 长沙师范学院 | Serial -type on -off control constant voltage power supply device |
-
2018
- 2018-10-17 CN CN201811212283.0A patent/CN109375690A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2282698Y (en) * | 1996-02-05 | 1998-05-27 | 辜明钟 | Internal control type switch voltage stabilizer |
| CN2927487Y (en) * | 2006-01-19 | 2007-07-25 | 海信集团有限公司 | DC converter with wide inputting-voltage range |
| CN104793677A (en) * | 2014-01-17 | 2015-07-22 | 瑞萨电子株式会社 | Semiconductor integrated circuit and method for operating same |
| CN104852577A (en) * | 2015-06-10 | 2015-08-19 | 灿瑞半导体(上海)有限公司 | Step-down DC converter |
| CN204925859U (en) * | 2015-07-20 | 2015-12-30 | 长沙师范学院 | Serial -type on -off control constant voltage power supply device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11695479B2 (en) | 2019-03-06 | 2023-07-04 | Consorzio Nazionale Interuniversitario Per Le Telecomunicazioni | Transmitters and receivers |
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Application publication date: 20190222 |