CN103440012A - Voltage source circuit - Google Patents
Voltage source circuit Download PDFInfo
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- CN103440012A CN103440012A CN2013103847458A CN201310384745A CN103440012A CN 103440012 A CN103440012 A CN 103440012A CN 2013103847458 A CN2013103847458 A CN 2013103847458A CN 201310384745 A CN201310384745 A CN 201310384745A CN 103440012 A CN103440012 A CN 103440012A
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- triode
- voltage source
- collector
- source circuit
- voltage
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Abstract
The invention discloses a voltage source circuit. The voltage source circuit comprises a constant-current source, triodes, a resistor and a capacitor, wherein a base electrode of the first triode is connected with a collector electrode of the first triode, and is connected with a base electrode of the second triode, and a collector electrode of the second triode is connected with a base electrode of the third triode. The voltage source circuit is simple in structure, high in stability of output voltage of reference voltage, low in temperature coefficient, good in temperature stability, low in noise and applicable to a power source with low voltage.
Description
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Technical field
The present invention relates to a kind of voltage source circuit, particularly a kind of band gap reference voltage source circuit.
Background technology
Reference voltage source circuit is the core unit circuit of Analogous Integrated Electronic Circuits; especially in power management class chip; reference voltage source has often determined the performance index of this type of chip, is widely used in the various simulations such as oscillator, phaselocked loop and data converter and hybrid digital-analog integrated circuit.But its circuit complexity, power consumption is large, is not easy to force down system applies.
Therefore need a kind of new technical scheme to solve the problems referred to above.
Summary of the invention
Goal of the invention: the problem and shortage existed for above-mentioned prior art, the purpose of this invention is to provide a kind of voltage source circuit, its voltage stability is high, and noise is low.
Technical scheme: the technical solution used in the present invention is a kind of voltage source circuit, this circuit comprises constant current source, triode, resistance and electric capacity, the base stage of the first triode is connected with its collector, and be connected with the base stage of the second triode, the collector of the second diode is connected with the base stage of the 3rd triode.
Preferably, the collector of the first triode is connected with constant current source by the first resistance, and the collector of the second triode is connected with constant current source by the second resistance, and the collector of the 3rd triode is connected with constant current source.
Preferably, the emitter of the 3rd triode is by the earth of the first electric capacity and the 4th resistance.
Beneficial effect: compared with prior art, its advantage is that circuit structure of the present invention is simple in the present invention, and the reference voltage output voltage stability is high, and temperature coefficient is little, and temperature stability is good, and noise is low, is applicable in the power supply of low-voltage.
The accompanying drawing explanation
Fig. 1 is circuit diagram of the present invention.
Embodiment
As shown in Figure 1, circuit of the present invention comprises constant current source, triode, resistance and electric capacity, and the base stage of the first triode Q1 is connected with its collector, and is connected with the base stage of the second triode Q2, and the collector of the second diode Q2 is connected with the base stage of the 3rd triode Q3; The collector of the first triode Q1 is connected with constant current source by the first resistance R 1, and the collector of the second triode Q2 is connected with constant current source by the second resistance, and the collector of the 3rd triode Q3 is connected with constant current source; The emitter of the 3rd triode Q3 is by the earth of the first capacitor C 1 and the 4th resistance R 4.
Circuit structure of the present invention is simple, and the reference voltage output voltage stability is high, and temperature coefficient is little, and temperature stability is good, and noise is low, is applicable in the power supply of low-voltage.
Claims (3)
1. a voltage source circuit, it is characterized in that: this circuit comprises constant current source, triode, resistance and electric capacity, the base stage of the first triode (Q1) is connected with its collector, and be connected with the base stage of the second triode (Q2), the collector of the second diode (Q2) is connected with the base stage of the 3rd triode (Q3).
2. a kind of voltage source circuit according to claim 1, it is characterized in that: the collector of described the first triode (Q1) is connected with constant current source by the first resistance (R1), the collector of described the second triode (Q2) is connected with constant current source by the second resistance, and the collector of described the 3rd triode (Q3) is connected with constant current source.
3. a kind of voltage source circuit according to claim 1 and 2 is characterized in that: the emitter of described the 3rd triode (Q3) is by the earth of the first electric capacity (C1) and the 4th resistance (R4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103847458A CN103440012A (en) | 2013-08-30 | 2013-08-30 | Voltage source circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103847458A CN103440012A (en) | 2013-08-30 | 2013-08-30 | Voltage source circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103440012A true CN103440012A (en) | 2013-12-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013103847458A Pending CN103440012A (en) | 2013-08-30 | 2013-08-30 | Voltage source circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN103440012A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109324654A (en) * | 2018-10-17 | 2019-02-12 | 江门市新会区炎泰电子有限公司 | A kind of band gap reference voltage source circuit |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070236203A1 (en) * | 2006-04-11 | 2007-10-11 | Nec Electronics Corporation | Power supply circuit capable of reducing the number of external components |
| CN101211193A (en) * | 2006-12-29 | 2008-07-02 | 联发科技股份有限公司 | Bandgap reference circuit and its starting method |
| US20080284395A1 (en) * | 2007-03-21 | 2008-11-20 | Vimicro Corporation | Low Dropout Voltage regulator |
| CN102244464A (en) * | 2011-07-08 | 2011-11-16 | 西安天照伟成电气有限公司 | Power circuit |
| CN102591392A (en) * | 2012-02-01 | 2012-07-18 | 深圳创维－Rgb电子有限公司 | Low-dropout linear regulator and chip |
| CN102622038A (en) * | 2012-03-29 | 2012-08-01 | 北京经纬恒润科技有限公司 | Band-gap reference voltage source circuit and band-gap reference voltage source |
-
2013
- 2013-08-30 CN CN2013103847458A patent/CN103440012A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070236203A1 (en) * | 2006-04-11 | 2007-10-11 | Nec Electronics Corporation | Power supply circuit capable of reducing the number of external components |
| CN101211193A (en) * | 2006-12-29 | 2008-07-02 | 联发科技股份有限公司 | Bandgap reference circuit and its starting method |
| US20080284395A1 (en) * | 2007-03-21 | 2008-11-20 | Vimicro Corporation | Low Dropout Voltage regulator |
| CN102244464A (en) * | 2011-07-08 | 2011-11-16 | 西安天照伟成电气有限公司 | Power circuit |
| CN102591392A (en) * | 2012-02-01 | 2012-07-18 | 深圳创维－Rgb电子有限公司 | Low-dropout linear regulator and chip |
| CN102622038A (en) * | 2012-03-29 | 2012-08-01 | 北京经纬恒润科技有限公司 | Band-gap reference voltage source circuit and band-gap reference voltage source |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109324654A (en) * | 2018-10-17 | 2019-02-12 | 江门市新会区炎泰电子有限公司 | A kind of band gap reference voltage source circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C05 | Deemed withdrawal (patent law before 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20131211 |