CN101776932A - Precision voltage adjusting circuit - Google Patents
Precision voltage adjusting circuit Download PDFInfo
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- CN101776932A CN101776932A CN200910245077A CN200910245077A CN101776932A CN 101776932 A CN101776932 A CN 101776932A CN 200910245077 A CN200910245077 A CN 200910245077A CN 200910245077 A CN200910245077 A CN 200910245077A CN 101776932 A CN101776932 A CN 101776932A
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Abstract
The invention relates to a precision voltage adjusting circuit. The circuit is formed by connecting an amplifying and filtering circuit, a voltage stabilizing circuit, an addition operation circuit and a protection circuit, wherein the amplifying and filtering circuit is formed by connecting resistors R1, R2 and R3, a capacitor C1, a +15V power supply, a -15V power supply and an operational amplifier U1A; the voltage stabilizing circuit is formed by connecting the -15V power supply, a resistor R9 and a voltage stabilizing tube U2; the addition operation circuit is formed by connecting the resistors R4, R5, R6 and R7 and an operational magnifier U1B; and the protection circuit is formed by connecting the resistor R8, a diode D1 and a +5V power supply. The circuit has the characteristics of simple structure, reasonable design, high practicality, high accuracy, low manufacturing cost, strong anti-interference ability, adjustability, stable and reliable performance, and wide scope of application.
Description
Technical field
The present invention relates to a kind of voltage-regulating circuit, particularly a kind of precision voltage adjusting circuit.
Background technology
At present, in general voltage-regulating circuit, ubiquity is adjusted precision problem, adjust precision and at first depend on the operational amplification circuit part, might there be AC noise and self-sustained oscillation during to the ac voltage signal scale operation, if can not rationally suppress AC noise, eliminate self-sustained oscillation, will cause bigger influence to the precision of adjusting, next is exactly the selection that voltage is adjusted reference source, whether the precision of voltage-regulating circuit, the direct accuracy of the whole voltage-regulating circuit of decision, two kinds of factors directly determine the availability of entire circuit, how to improve and the influence that suppresses two kinds of factors directly determines the performance of voltage conversion circuit.
Summary of the invention
The objective of the invention is to overcome above-mentioned weak point, a kind of circuit advantages of simple, performance is safe and reliable, applicability is strong precision voltage adjusting circuit are provided.
The technical solution adopted in the present invention is for achieving the above object: a kind of precision voltage adjusting circuit is characterized in that: this circuit is connected to form by amplification filtering circuit, mu balanced circuit, adder operation circuit and holding circuit; One termination input end of the resistance R 1 in the described amplification filtering circuit, one end of the reverse input end of another termination operational amplifier U1A of resistance R 1, capacitor C 1, resistance R 3, the output terminal of another termination operational amplifier U1A of capacitor C 1, resistance R 3, an end of resistance R 5, one end ground connection of resistance R 2, the positive input of its another termination operational amplifier U1A ,+15V power supply ,-the 15V power supply connects 8 pins, 4 pins of operational amplifier U1A respectively; In the described mu balanced circuit-end of 15V power supply connecting resistance R9, the anode A end of another termination stabilivolt U2 of R9, an end of resistance R 4, negative electrode K end and the reference edge REF of stabilivolt U2 hold ground connection; The other end of the other end connecting resistance R4 of the resistance R 5 in the described adding circuit, an end of resistance R 7, the reverse input end of operational amplifier U1B, the positive input of another termination operational amplifier U1B of resistance R 6, the output terminal of another termination operational amplifier U1B of resistance R 7, an end of resistance R 8; Anode, the circuit output end of another terminating diode D1 of the resistance R 8 in the described holding circuit, the negative electrode of diode D1 connects+the 5V power supply.
The invention has the beneficial effects as follows: its circuit is simple, and is reasonable in design, is suitable for strong operability, the degree of accuracy height; Low cost of manufacture be difficult for to be disturbed other circuit or disturbed by other circuit, and is stable and reliable for performance, has wide range of applications.
Description of drawings
Fig. 1 is the schematic diagram of circuit of the present invention.
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment, to according to embodiment provided by the invention, structure, details are as follows for feature:
Referring to Fig. 1, a kind of precision voltage adjusting circuit, this circuit is connected to form by amplification filtering circuit, mu balanced circuit, adder operation circuit and holding circuit; One termination input end of the resistance R 1 in the described amplification filtering circuit, one end of the reverse input end of another termination operational amplifier U1A of resistance R 1, capacitor C 1, resistance R 3, the output terminal of another termination operational amplifier U1A of capacitor C 1, resistance R 3, an end of resistance R 5, one end ground connection of resistance R 2, the positive input of its another termination operational amplifier U1A ,+15V power supply ,-the 15V power supply connects 8 pins, 4 pins of operational amplifier U1A respectively; In the described mu balanced circuit-end of 15V power supply connecting resistance R9, the anode A end of another termination stabilivolt U2 of R9, an end of resistance R 4, negative electrode K end and the reference edge REF of stabilivolt U2 hold ground connection; The other end of the other end connecting resistance R4 of the resistance R 5 in the described adding circuit, an end of resistance R 7, the reverse input end of operational amplifier U1B, the positive input of another termination operational amplifier U1B of resistance R 6, the output terminal of another termination operational amplifier U1B of resistance R 7, an end of resistance R 8; Anode, the circuit output end WI of another terminating diode D1 of the resistance R 8 in the described holding circuit, the negative electrode of diode D1 connects+the 5V power supply.
Main component parameter is for example selected:
The resistance of resistance parameter: R1 is 20K Ω, and the resistance of R2, R6 is 5.1K Ω,, the resistance of R3, R4, R5, R7 is 10K Ω, the resistance of R8 is 200 Ω, the resistance of R9 is 3K Ω;
The capacity of capacitor C 1 is 0.01 μ F;
The operational amplifier model is LM393.
Principle of work: this circuit is provided with an input end, output terminal and power supply positive-negative input end.Circuit is divided into four parts, first is the input voltage signal adjustment member, be the amplification filtering circuit: after input signal HALLW input, resistance R 1, R2, R3, capacitor C 1, operational amplifier U1A constitute reverse ratio amplifying circuit, capacitor C 1 capacity herein is less, play elimination self-sustained oscillation, as the effect of lead compensation; Second portion is a mu balanced circuit: U2 is three ends parallel voltage-stabilizing diodes able to programme, connection as shown in Figure 1, the reference voltage of A end (anode) output-2.5V of stabilivolt U2; Third part is reverse adder operation circuit, and the output signal of operational amplifier U1A and voltage stabilizing reference source constitute two input signals of reverse adder operation circuit, through oppositely summation back output; The 4th part is exceeded and is flow through voltage protection circuit, connects the anode of diode after prime output process resistance R 8 current limlitings, and the negative electrode of diode connects+the 5V power supply, prevents that output end signal WI is higher than+5V, the protection late-class circuit.
Above-mentionedly with reference to example this precision voltage adjusting circuit being described in detail, is illustrative rather than determinate, therefore in the variation and the modification that do not break away under the general plotting of the present invention, should belong within protection scope of the present invention.
Claims (1)
1. precision voltage adjusting circuit, it is characterized in that: this circuit is connected to form by amplification filtering circuit, mu balanced circuit, adder operation circuit and holding circuit; One termination input end of the resistance R 1 in the described amplification filtering circuit, one end of the reverse input end of another termination operational amplifier U1A of resistance R 1, capacitor C 1, resistance R 3, the output terminal of another termination operational amplifier U1A of capacitor C 1, resistance R 3, an end of resistance R 5, one end ground connection of resistance R 2, the positive input of its another termination operational amplifier U1A ,+15V power supply ,-the 15V power supply connects 8 pins, 4 pins of operational amplifier U1A respectively; In the described mu balanced circuit-end of 15V power supply connecting resistance R9, the anode A end of another termination stabilivolt U2 of R9, an end of resistance R 4, negative electrode K end and the reference edge REF of stabilivolt U2 hold ground connection; The other end of the other end connecting resistance R4 of the resistance R 5 in the described adding circuit, an end of resistance R 7, the reverse input end of operational amplifier U1B, the positive input of another termination operational amplifier U1B of resistance R 6, the output terminal of another termination operational amplifier U1B of resistance R 7, an end of resistance R 8; Anode, the circuit output end of another terminating diode D1 of the resistance R 8 in the described holding circuit, the negative electrode of diode D1 connects+the 5V power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910245077A CN101776932B (en) | 2009-12-25 | 2009-12-25 | Precision voltage adjusting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910245077A CN101776932B (en) | 2009-12-25 | 2009-12-25 | Precision voltage adjusting circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101776932A true CN101776932A (en) | 2010-07-14 |
| CN101776932B CN101776932B (en) | 2012-09-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910245077A Expired - Fee Related CN101776932B (en) | 2009-12-25 | 2009-12-25 | Precision voltage adjusting circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN101776932B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103457488A (en) * | 2013-09-12 | 2013-12-18 | 昆山新金福精密电子有限公司 | Series voltage stabilizing circuit |
| CN105203829A (en) * | 2015-10-22 | 2015-12-30 | 国家电网公司 | Power frequency high voltage measuring device of high voltage standard capacitor based on SF6 gas insulation |
| CN106556732A (en) * | 2015-09-30 | 2017-04-05 | 中兴通讯股份有限公司 | Current detection circuit and electric current detecting method |
| CN111025212A (en) * | 2019-11-27 | 2020-04-17 | 中国电力科学研究院有限公司 | Precise reverse phase proportional booster circuit |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1209691C (en) * | 2003-03-06 | 2005-07-06 | 威盛电子股份有限公司 | Prechargeable voltage stabilizing circuit and relevant method |
| CN201142637Y (en) * | 2008-01-11 | 2008-10-29 | 秦一涛 | Adjustable voltage circuit |
| CN201607655U (en) * | 2009-12-25 | 2010-10-13 | 天津诺尔哈顿电器制造有限公司 | Precision voltage regulating circuit |
-
2009
- 2009-12-25 CN CN200910245077A patent/CN101776932B/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103457488A (en) * | 2013-09-12 | 2013-12-18 | 昆山新金福精密电子有限公司 | Series voltage stabilizing circuit |
| CN103457488B (en) * | 2013-09-12 | 2015-10-21 | 昆山新金福精密电子有限公司 | A kind of serial voltage regulation circuit |
| CN106556732A (en) * | 2015-09-30 | 2017-04-05 | 中兴通讯股份有限公司 | Current detection circuit and electric current detecting method |
| CN105203829A (en) * | 2015-10-22 | 2015-12-30 | 国家电网公司 | Power frequency high voltage measuring device of high voltage standard capacitor based on SF6 gas insulation |
| CN111025212A (en) * | 2019-11-27 | 2020-04-17 | 中国电力科学研究院有限公司 | Precise reverse phase proportional booster circuit |
| CN111025212B (en) * | 2019-11-27 | 2022-10-04 | 中国电力科学研究院有限公司 | Precise reverse-phase proportional booster circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101776932B (en) | 2012-09-26 |
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Address after: 300000 Tianjin city Xiqing District Jintai Road No. 6 (Dasi) Patentee after: TIANJIN NOLE ELECTRIC Co.,Ltd. Address before: 300000 Tianjin city Xiqing District Jintai Road No. 6 (Dasi) Patentee before: Tianjin Knoll Hatton Electric Co.,Ltd. |
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Address after: 300000 Tianjin city Xiqing District Jintai Road No. 6 (Dasi) Patentee after: Tianjin Knoll Hatton Electric Co.,Ltd. Address before: 300381 Tianjin City, Xiqing Economic Development Zone Industrial Park Ze Road No. 20 Hung Temple Patentee before: Tianjin Nuoerhatun Electric Manufacturing Co.,Ltd. |
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