CN101763130A - Voltage-stabilizing circuit with temperature compensation - Google Patents
Voltage-stabilizing circuit with temperature compensation Download PDFInfo
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- CN101763130A CN101763130A CN200910188908A CN200910188908A CN101763130A CN 101763130 A CN101763130 A CN 101763130A CN 200910188908 A CN200910188908 A CN 200910188908A CN 200910188908 A CN200910188908 A CN 200910188908A CN 101763130 A CN101763130 A CN 101763130A
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- 238000001914 filtration Methods 0.000 claims abstract description 8
- 230000000087 stabilizing effect Effects 0.000 claims description 10
- 239000003990 capacitor Substances 0.000 description 9
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
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Abstract
The invention discloses a voltage-stabilizing circuit with temperature compensation, comprising: a first capacitance (C134), a transistor (V107), a diode (VD 105), a voltage-stabilizing diode (VD 106) and a fourth capacitance (C 137); the power supply input end is connected with the collecting electrode of the transistor (V 107) through the first capacitance (C134), the base electrode of the transistor (V 107) is connected with the anode of the diode (VD 105), the cathode of the diode (VD 105) is connected with the cathode of the voltage-stabilizing diode (VD 106), the anode of the voltage-stabilizing diode (VD 106) is grounded, and the emitting electrode of the transistor (V 107) is connected with the power supply output end through the fourth capacitance (C 137) filtering. Based on voltage-stabilizing circuit of general discrete parts, the invention provides the scheme of voltage-stabilizing circuit with temperature compensation, improves the machine performance, increases reliability, and solves the problems of leakage of TV stations and finding no TV stations.
Description
Technical field
The present invention relates to the circuit engineering field, relate in particular to a kind of mu balanced circuit with temperature compensation.
Background technology
Raising along with people's living standard, televisor has become one of each requisite electric equipment of family, thereby produce television manufacturer in order to adapt to industry competition, reduction televisor production cost has become in the industry primarily deals with problems, originally adopt integrated stable voltage circuit also to be changed to simple serial regulating circuit, be used for CPU, intermediate frequency demodulation, the first-class power supply of high frequency.
Existing, serial regulating circuit adopts transistor, realizes the stable of output voltage with discrete component, comprises elements such as transistor, voltage stabilizing diode, resistance, electric capacity.But, because the PN of transistor, voltage stabilizing diode joint junction voltage varies with temperature, make voltage output unstable, thereby causing temperature to waft loses platform, leak platform, search less than a series of problems such as platforms.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of mu balanced circuit with temperature compensation.
For solving the problems of the technologies described above, the objective of the invention is to be achieved through the following technical solutions.
A kind of mu balanced circuit with temperature compensation comprises: first electric capacity (C134), triode (V107), diode (VD105), voltage stabilizing diode (VD106) and the 4th electric capacity (C137); Power input links to each other with triode (V107) collector through first electric capacity (C134) filtering, the base stage of triode (V107) links to each other with the anode of diode (VD105), the negative electrode of diode (VD105) links to each other with the negative electrode of voltage stabilizing diode (VD106), the plus earth of voltage stabilizing diode (VD106); The emitter of triode (V107) connects power output end through the 4th electric capacity (C137) filtering.
Wherein, also comprise resistance (R143), a termination power input end of described resistance (R143), the other end links to each other with the base stage of triode (V107).
Wherein, also comprise second electric capacity (C135) and the 3rd electric capacity (C136), the base stage of described second electric capacity (C135) and the 3rd electric capacity (C136) back in parallel one termination triode (V107), other end ground connection.
Above technical scheme as can be seen, the present invention has following beneficial effect:
The present invention has proposed the mu balanced circuit scheme of band temperature compensation on existing common separate piece mu balanced circuit basis, improved the complete machine performance, has improved reliability, has solved televisor and has leaked platform, searches less than a series of problems such as platforms.
Description of drawings
Fig. 1 is circuit theory diagrams of the present invention.
Embodiment
The mu balanced circuit of televisor is used circuit of three-terminal voltage-stabilizing integrated usually, sort circuit can provide the 1-2A electric current, can satisfy the requirement of circuit design, but because the industry competition fierceness, the circuit of little electric current is used instead discrete component designing voltage regulator circuit, can be reduced cost like this.
The mu balanced circuit of discrete component is because the transistor that adopts, the PN junction of diode can occurrence temperature drift about with temperature, make output voltage that certain variation range be arranged, particularly under high temperature and cryogenic conditions, be difficult to satisfy the complete machine performance requirement, be used in such as sort circuit and be easy to cause low temperature to search in the vision intermediate frequency demodulator circuit less than the platform problem.At the problems referred to above, the present invention proposes the simple serial regulating circuit of band temperature compensation.
For ease of the present invention is further understood, now reach specific embodiment in conjunction with the accompanying drawings and describe the present invention.
See also shown in Figure 1ly, comprising: first capacitor C 134, second capacitor C 135, the 3rd capacitor C 136, the 4th capacitor C 137, triode V107, resistance R 143, diode VD105, voltage stabilizing diode VD106; 134 filtering are added to the collector of triode V107 to input voltage through first capacitor C, be added to triode V107 base stage through resistance R 143 simultaneously, give diode VD105 simultaneously, voltage stabilizing diode VD106 provide working current, triode V107 base stage is also stablized the base reference voltage of triode V107 by 136 filtering of second capacitor C, 135, the three capacitor C.Triode V107 emitter connects the 4th capacitor C 137 capacitor filterings.
It is 5.1V+0.7V that VD105, VD106 provide voltage for the V107 base stage, because the V107 base voltage is fixed, emitter voltage is the 5.1V+0.7V-0.7V=5.1V theoretical value.But in fact the mu balanced circuit output voltage is not a theoretical value, and especially when temperature changed, output voltage also can change, and reason is exactly the variation of PN junction voltage.
With the low temperature test is example, and during temperature variation, the variation of junction voltage is as follows:
Normal temperature low temperature
VD106： 5.08V 5.02V
VD105： 0.688 0.826
V107.BE： 0.663 0.837
The BE knot of visible crystals triode V107 and the PN junction of VD105 become big with temperature decline junction voltage.
VD105 forward conduction voltage increases when temperature reduces, and the V107 base reference voltage is also increased, but the BE junction voltage of V107 also increases under the low-temperature condition, and output voltage is remained unchanged.This shows that VD105 is opposite with V107 junction voltage direction, thereby play the effect that temperature compensates mutually.
The present invention proves that through high low-temperature test output voltage stabilization is reliable, and change in voltage is little, has improved the complete machine performance.
More than a kind of mu balanced circuit with temperature compensation provided by the present invention is described in detail, used specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (3)
1. the mu balanced circuit with temperature compensation is characterized in that, comprising: first electric capacity (C134), triode (V107), diode (VD105), voltage stabilizing diode (VD106) and the 4th electric capacity (C137); Power input links to each other with triode (V107) collector through first electric capacity (C134) filtering, the base stage of triode (V107) links to each other with the anode of diode (VD105), the negative electrode of diode (VD105) links to each other with the negative electrode of voltage stabilizing diode (VD106), the plus earth of voltage stabilizing diode (VD106); The emitter of triode (V107) connects power output end through the 4th electric capacity (C137) filtering.
2. the mu balanced circuit of band temperature compensation according to claim 1 is characterized in that, also comprises resistance (R143), a termination power input end of described resistance (R143), and the other end links to each other with the base stage of triode (V107).
3. the mu balanced circuit of band temperature compensation according to claim 1 and 2, it is characterized in that, also comprise second electric capacity (C135) and the 3rd electric capacity (C136), the base stage of described second electric capacity (C135) and the 3rd electric capacity (C136) back in parallel one termination triode (V107), other end ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910188908A CN101763130A (en) | 2009-12-11 | 2009-12-11 | Voltage-stabilizing circuit with temperature compensation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910188908A CN101763130A (en) | 2009-12-11 | 2009-12-11 | Voltage-stabilizing circuit with temperature compensation |
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| CN101763130A true CN101763130A (en) | 2010-06-30 |
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| CN200910188908A Pending CN101763130A (en) | 2009-12-11 | 2009-12-11 | Voltage-stabilizing circuit with temperature compensation |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102882358A (en) * | 2011-07-13 | 2013-01-16 | 通用电气公司 | Methods and systems for operating power converters |
| CN104898756A (en) * | 2015-06-15 | 2015-09-09 | 灿芯半导体(上海)有限公司 | Voltage regulating circuit |
| CN104965554A (en) * | 2014-11-25 | 2015-10-07 | 成都颉盛科技有限公司 | High-efficiency charge pump stabilized voltage supply device for buffer driving |
| CN105511544A (en) * | 2016-01-15 | 2016-04-20 | 中山芯达电子科技有限公司 | Adjustable voltage stabilizing circuit |
| CN108205350A (en) * | 2016-12-16 | 2018-06-26 | 航天科工惯性技术有限公司 | A kind of high temperature resistant servo circuit voltage regulator and accelerometer |
-
2009
- 2009-12-11 CN CN200910188908A patent/CN101763130A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102882358A (en) * | 2011-07-13 | 2013-01-16 | 通用电气公司 | Methods and systems for operating power converters |
| CN102882358B (en) * | 2011-07-13 | 2016-12-21 | 通用电气公司 | On-off circuit in power converter and electricity generation system |
| CN104965554A (en) * | 2014-11-25 | 2015-10-07 | 成都颉盛科技有限公司 | High-efficiency charge pump stabilized voltage supply device for buffer driving |
| CN104965554B (en) * | 2014-11-25 | 2016-08-24 | 国网山东省电力公司德州供电公司 | A kind of buffered-display driver high efficiency charge pump stabilized voltage supply device |
| CN104898756A (en) * | 2015-06-15 | 2015-09-09 | 灿芯半导体(上海)有限公司 | Voltage regulating circuit |
| CN105511544A (en) * | 2016-01-15 | 2016-04-20 | 中山芯达电子科技有限公司 | Adjustable voltage stabilizing circuit |
| CN108205350A (en) * | 2016-12-16 | 2018-06-26 | 航天科工惯性技术有限公司 | A kind of high temperature resistant servo circuit voltage regulator and accelerometer |
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Application publication date: 20100630 |