CN103929061A - Constant flow source with single power supply adjustable - Google Patents
Constant flow source with single power supply adjustable Download PDFInfo
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- CN103929061A CN103929061A CN201410181545.7A CN201410181545A CN103929061A CN 103929061 A CN103929061 A CN 103929061A CN 201410181545 A CN201410181545 A CN 201410181545A CN 103929061 A CN103929061 A CN 103929061A
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Abstract
The invention relates to a constant flow source and provides a constant flow source with a single power supply adjustable. The constant flow source with the single power supply adjustable solves the problem that an existing current supply is large in power consumption. According to the constant flow source with the single power supply adjustable, one end of a first resistor and one end of a second resistor are simultaneously connected with the power supply anode, the other end of the first resistor is connected with the emitter of an audion, the second resistor is connected with one fixed contact of an adjustable resistor, the other fixed contact of the adjustable resistor is electrically connected with one end of a third resistor, the base of the audion and one end of a first capacitor are simultaneously connected with the sliding contact of the adjustable resistor, the collector of the audion and one end of a second capacitor serve as a current output end of the constant flow source at the same time, and the other end of the third resistor, the other end of the first capacitor and the other end of the second capacitor are simultaneously grounded. The constant flow source is applied to providing constant current signals during production of electronic products including motormeters and others.
Description
Technical field
The present invention relates to a kind of constant-current source.
Background technology
In the electronic products such as automobile instrument are produced, much need constant current signal (majority is all in tens milliamperes), and such signal is all generally to adopt current source output, current source is on the market all generally more than 500 yuan, cost is very high, and power consumption is large, power output proportion is also little.
Summary of the invention
The present invention is in order to solve the large problem of existing current source power consumption, single supply adjustable constant-flow source to be now provided.
Single supply adjustable constant-flow source, it comprises: the first resistance, the second resistance, the 3rd resistance, adjustable resistance, the first electric capacity, the second electric capacity and triode;
One end of one end of the first resistance and the second resistance is connected positive source simultaneously;
The emitter of the other end connecting triode of the first resistance, the other end of the second resistance connects a fixed contact of adjustable resistance, another fixed contact of adjustable resistance connects one end of the 3rd resistance, the base stage of triode and one end of the first electric capacity are connected the sliding contact of adjustable resistance simultaneously, and one end of the collector electrode of triode and the second electric capacity is simultaneously as the current output terminal of constant-current source;
The other end of the other end of the other end of the 3rd resistance, the first electric capacity and the second electric capacity is ground connection simultaneously.
Above-mentioned single supply adjustable constant-flow source also comprises: connector;
The pin 1 of connector connects positive source, and the pin 2 of connector and pin 4 be ground connection simultaneously, and the pin 3 of connector connects the current output terminal of constant-current source.
Single supply adjustable constant-flow of the present invention source, does not need to provide separately power supply in use, directly accesses the instrument power of automobile, easy to use, simple in structure, and the low and volume urine of cost is in installation; Meanwhile, single supply adjustable constant-flow of the present invention source power consumption is less than 3 watts, and loss power is reduced to below 20 milliwatts.The present invention is applicable to provide constant current signal in the electronic products such as automobile instrument are produced.
Accompanying drawing explanation
Fig. 1 is the electrical structure schematic diagram in single supply adjustable constant-flow of the present invention source.
Embodiment
Embodiment one: illustrate present embodiment with reference to Fig. 1, single supply adjustable constant-flow source described in present embodiment, it comprises: the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, adjustable resistance RD1, the first capacitor C 1, the second capacitor C 2 and triode VT1;
One end of one end of the first resistance R 1 and the second resistance R 2 is connected positive source simultaneously;
The emitter of the other end connecting triode VT1 of the first resistance R 1, the other end of the second resistance R 2 connects a fixed contact of adjustable resistance RD1, another fixed contact of adjustable resistance RD1 connects one end of the 3rd resistance R 3, the base stage of triode VT1 and one end of the first capacitor C 1 are connected the sliding contact of adjustable resistance RD1 simultaneously, and one end of the collector electrode of triode VT1 and the second capacitor C 2 is simultaneously as the current output terminal of constant-current source;
The other end of the other end of the other end of the 3rd resistance R 3, the first capacitor C 1 and the second capacitor C 2 is ground connection simultaneously.
Embodiment two: present embodiment is that the single supply adjustable constant-flow source described in embodiment one is described further, and in present embodiment, it also comprises: connector XS1;
The pin 1 of connector XS1 connects positive source, and the pin 2 of connector XS1 and pin 4 be ground connection simultaneously, and the pin 3 of connector XS1 connects the current output terminal of constant-current source.
In present embodiment, the connector XS1 of increase is used for making constant-current source to be connected with the external world.
Embodiment three: present embodiment is that the single supply adjustable constant-flow source described in embodiment one or two is described further, and in present embodiment, described triode VT1 is positive-negative-positive triode.
Embodiment four: present embodiment is that the single supply adjustable constant-flow source described in embodiment one or two is described further, in present embodiment, the resistance of the first resistance R 1 is 20 Ω, and the resistance of the second resistance R 2 is that the resistance of 5k Ω, the 3rd resistance R 3 is 20k Ω.
Embodiment five: present embodiment is that the single supply adjustable constant-flow source described in embodiment one or two is described further, and in present embodiment, the Standard resistance range of adjustable resistance RD1 is between 0 to 100k Ω.
Embodiment six: present embodiment is that the single supply adjustable constant-flow source described in embodiment one or two is described further, in present embodiment, the value of the first capacitor C 1 is that the value of 0.01 μ F, the second capacitor C 2 is 10 μ F.
Embodiment seven: present embodiment is that the single supply adjustable constant-flow source described in embodiment one or two is described further, in present embodiment, the magnitude of voltage of described constant-current source access is 12V.
The operation principle in single supply adjustable constant-flow of the present invention source:
N-type triode, while being operated in amplification region, Ic ≈ β Ib; In foregoing circuit, by regulating adjustable resistance RD1 can change the base voltage of triode VT1, when regulating end, the base voltage Vb of triode VT1 fixes, because R1 is very little, therefore emitter voltage Ve is also fixing, therefore the voltage Veb between emitter and base stage is fixed value, and now base current Ib is fixed value, by the known collector current Ic of Ic ≈ β Ib, is fixed, be that output current is fixed value, complete constant current output.
Wherein the second resistance R 2 and the 3rd resistance R 3 are for regulation voltage scope.The first capacitor C 1 and the second capacitor C 2 can prevent the interference of extraneous electric current.
Claims (7)
1. single supply adjustable constant-flow source, it is characterized in that, it comprises: the first resistance (R1), the second resistance (R2), the 3rd resistance (R3), adjustable resistance (RD1), the first electric capacity (C1), the second electric capacity (C2) and triode (VT1);
One end of the first resistance (R1) is connected positive source with one end of the second resistance (R2) simultaneously;
The emitter of the other end connecting triode (VT1) of the first resistance (R1), the other end of the second resistance (R2) connects a fixed contact of adjustable resistance (RD1), another fixed contact of adjustable resistance (RD1) connects one end of the 3rd resistance (R3), the base stage of triode (VT1) and one end of the first electric capacity (C1) are connected the sliding contact of adjustable resistance (RD1) simultaneously, and one end of the collector electrode of triode (VT1) and the second electric capacity (C2) is simultaneously as the current output terminal of constant-current source;
The other end of the other end of the other end of the 3rd resistance (R3), the first electric capacity (C1) and the second electric capacity (C2) is ground connection simultaneously.
2. single supply adjustable constant-flow according to claim 1 source, is characterized in that, it also comprises: connector (XS1);
The pin 1 of connector (XS1) connects positive source, and the pin 2 of connector (XS1) and pin 4 be ground connection simultaneously, and the pin 3 of connector (XS1) connects the current output terminal of constant-current source.
3. single supply adjustable constant-flow according to claim 1 and 2 source, is characterized in that, described triode (VT1) is positive-negative-positive triode.
4. single supply adjustable constant-flow according to claim 1 and 2 source, is characterized in that, the resistance of the first resistance (R1) is 20 Ω, and the resistance of the second resistance (R2) is 5k Ω, and the resistance of the 3rd resistance (R3) is 20k Ω.
5. single supply adjustable constant-flow according to claim 1 and 2 source, is characterized in that, the Standard resistance range of adjustable resistance (RD1) is between 0 to 100k Ω.
6. single supply adjustable constant-flow according to claim 1 and 2 source, is characterized in that, the value of the first electric capacity (C1) is 0.01 μ F, and the value of the second electric capacity (C2) is 10 μ F.
7. single supply adjustable constant-flow according to claim 1 and 2 source, is characterized in that, the magnitude of voltage of described constant-current source access is 12V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410181545.7A CN103929061A (en) | 2014-04-30 | 2014-04-30 | Constant flow source with single power supply adjustable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410181545.7A CN103929061A (en) | 2014-04-30 | 2014-04-30 | Constant flow source with single power supply adjustable |
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| Publication Number | Publication Date |
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| CN103929061A true CN103929061A (en) | 2014-07-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201410181545.7A Pending CN103929061A (en) | 2014-04-30 | 2014-04-30 | Constant flow source with single power supply adjustable |
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| Country | Link |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104967340A (en) * | 2015-06-18 | 2015-10-07 | 周玉林 | Large-power adjustable DC regulated power supply |
| CN105759887A (en) * | 2015-12-07 | 2016-07-13 | 重庆川仪自动化股份有限公司 | Current output circuit in flowmeter checking equipment |
| CN107994780A (en) * | 2017-12-27 | 2018-05-04 | 诺仪器（中国）有限公司 | Optical fiber splicer electrode bar electrion control circuit and method |
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| CN1066000A (en) * | 1991-04-26 | 1992-11-11 | 刘昆 | Spur therapeutic equipment |
| CN1797260A (en) * | 2004-12-28 | 2006-07-05 | 华为技术有限公司 | Circuit of constant current source |
| CN2896694Y (en) * | 2006-05-08 | 2007-05-02 | 于波 | Permanent controllable constant-pressure generator control cirulit |
| CN200947577Y (en) * | 2006-07-07 | 2007-09-12 | 李文舟 | Adjustable constant current voltage-stabilized power supply |
| CN101150026A (en) * | 2006-03-30 | 2008-03-26 | 阿尔卡特朗讯公司 | Electrical circuit for a self-retaining relay |
| CN201464769U (en) * | 2009-06-17 | 2010-05-12 | 北京空间机电研究所 | Focal plane analog signal constant-current source output circuit of remote sensing CCD camera |
| CN201509335U (en) * | 2008-09-05 | 2010-06-16 | 李旭明 | Driver circuit for constant current source and component therefor |
| CN202649263U (en) * | 2012-05-14 | 2013-01-02 | 南大傲拓科技江苏有限公司 | Double shift single constant current source circuit |
-
2014
- 2014-04-30 CN CN201410181545.7A patent/CN103929061A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1066000A (en) * | 1991-04-26 | 1992-11-11 | 刘昆 | Spur therapeutic equipment |
| CN1797260A (en) * | 2004-12-28 | 2006-07-05 | 华为技术有限公司 | Circuit of constant current source |
| CN101150026A (en) * | 2006-03-30 | 2008-03-26 | 阿尔卡特朗讯公司 | Electrical circuit for a self-retaining relay |
| CN2896694Y (en) * | 2006-05-08 | 2007-05-02 | 于波 | Permanent controllable constant-pressure generator control cirulit |
| CN200947577Y (en) * | 2006-07-07 | 2007-09-12 | 李文舟 | Adjustable constant current voltage-stabilized power supply |
| CN201509335U (en) * | 2008-09-05 | 2010-06-16 | 李旭明 | Driver circuit for constant current source and component therefor |
| CN201464769U (en) * | 2009-06-17 | 2010-05-12 | 北京空间机电研究所 | Focal plane analog signal constant-current source output circuit of remote sensing CCD camera |
| CN202649263U (en) * | 2012-05-14 | 2013-01-02 | 南大傲拓科技江苏有限公司 | Double shift single constant current source circuit |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104967340A (en) * | 2015-06-18 | 2015-10-07 | 周玉林 | Large-power adjustable DC regulated power supply |
| CN105759887A (en) * | 2015-12-07 | 2016-07-13 | 重庆川仪自动化股份有限公司 | Current output circuit in flowmeter checking equipment |
| CN107994780A (en) * | 2017-12-27 | 2018-05-04 | 诺仪器（中国）有限公司 | Optical fiber splicer electrode bar electrion control circuit and method |
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| CB03 | Change of inventor or designer information |
Inventor after: Hu Wei Inventor after: Teng Shengguang Inventor after: Wang Yang Inventor after: Cang Junwang Inventor after: Feng Yongming Inventor after: Sun Jingwu Inventor after: Zhang Xiuying Inventor after: Wang Yu Inventor before: Hu Wei Inventor before: Liu Jinze Inventor before: Wang Yang Inventor before: Cang Junwang Inventor before: Feng Yongming Inventor before: Sun Jingwu Inventor before: Xu Zhaomeng Inventor before: Zhang Xiuying Inventor before: Zhang Fenglu |
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Application publication date: 20140716 |