CN103472280A - Voltage detection circuit - Google Patents
Voltage detection circuit Download PDFInfo
- Publication number
- CN103472280A CN103472280A CN2013104142882A CN201310414288A CN103472280A CN 103472280 A CN103472280 A CN 103472280A CN 2013104142882 A CN2013104142882 A CN 2013104142882A CN 201310414288 A CN201310414288 A CN 201310414288A CN 103472280 A CN103472280 A CN 103472280A
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- triode
- detection circuit
- voltage
- resistance
- variable resistor
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- Measurement Of Current Or Voltage (AREA)
Abstract
The invention discloses a voltage detection circuit. The voltage detection circuit comprises an audion, a variable resistor and a capacitor. The voltage detection circuit can rapidly detect voltage variation and carry out relative processing on the generated voltage variation timely. The voltage detection circuit is simple in structure, easy to achieve and suitable for detection on power source voltage in a small laboratory.
Description
Technical field
The present invention relates to a kind of metering circuit, particularly a kind of voltage detecting circuit.
Background technology
The public all knows, resistance capacitance adopts exponential type to be discharged usually, so the speed of the larger electric discharge of resistance capacitance value will be slower, so power supply unit just can be sensed the alternating voltage generation problem of input after situation occurs for a long time, cause the reaction time of power supply unit too slow, can't make circuit operate under optimized state again, more without the lifting that is beneficial to product usefulness.
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 detecting circuit, can accurate response alternating voltage situation of change.
Technical scheme: the technical solution used in the present invention is a kind of voltage detecting circuit, comprise triode, variable resistor and electric capacity, a variable-resistance end is connected with power supply, variable-resistance sliding end is by the 4th capacity earth, variable-resistance sliding end is connected with the base stage of triode, the emitter of triode is by the 3rd resistance eutral grounding, the base stage of triode is by the second resistance eutral grounding, the collector of triode is connected with emitter by the first electric capacity, the first inductance and variable capacitance form series resonant tank, series resonant tank one end is connected with the collector of triode, its other end ground connection, the collector of triode is as output terminal.
Preferably, the two ends of the first inductance the 4th resistance in parallel.
Beneficial effect: the present invention compared with prior art, its advantage is energy fast detecting change in voltage of the present invention, can to the change in voltage produced, relatively process timely, and circuit structure is simple, easily realize, be applicable to small-size laboratory supply voltage is detected.
The accompanying drawing explanation
Fig. 1 is circuit diagram of the present invention.
Embodiment
As shown in Figure 1, the present invention includes triode, variable resistor and electric capacity, the end of variable resistor R1 is connected with power supply, the sliding end of variable resistor R1 is by the 4th capacitor C 4 ground connection, the sliding end of variable resistor R1 is connected with the base stage of triode Q1, the emitter of triode Q1 is by the 3rd resistance R 3 ground connection, the base stage of triode (Q1) is by the second resistance R 2 ground connection, the collector of triode Q1 is connected with emitter by the first capacitor C 1, the first inductance L 1 forms series resonant tank with variable capacitance C3, the two ends of the first inductance L 1 the 4th resistance R 4 in parallel, series resonant tank one end is connected with the collector of triode Q1, its other end ground connection, the collector of triode Q1 is as output terminal.
Energy fast detecting change in voltage of the present invention, can process the change in voltage produced timely relatively, and circuit structure is simple, easily realizes, is applicable to small-size laboratory supply voltage is detected.
Claims (2)
1. a voltage detecting circuit, it is characterized in that: comprise triode, variable resistor and electric capacity, one end of described variable resistor (R1) is connected with power supply, the sliding end of variable resistor (R1) is by the 4th electric capacity (C4) ground connection, the sliding end of described variable resistor (R1) is connected with the base stage of triode (Q1), the emitter of described triode (Q1) is by the 3rd resistance (R3) ground connection, the base stage of described triode (Q1) is by the second resistance (R2) ground connection, the collector of triode (Q1) is connected with emitter by the first electric capacity (C1), the first inductance (L1) forms series resonant tank with variable capacitance (C3), described series resonant tank one end is connected with the collector of triode (Q1), its other end ground connection, the collector of described triode (Q1) is as output terminal.
2. a kind of voltage detecting circuit according to claim 1, is characterized in that: the two ends of described the first inductance (L1) the 4th resistance (R4) in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013104142882A CN103472280A (en) | 2013-09-12 | 2013-09-12 | Voltage detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013104142882A CN103472280A (en) | 2013-09-12 | 2013-09-12 | Voltage detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103472280A true CN103472280A (en) | 2013-12-25 |
Family
ID=49797205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013104142882A Pending CN103472280A (en) | 2013-09-12 | 2013-09-12 | Voltage detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103472280A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104090152A (en) * | 2014-06-16 | 2014-10-08 | 福建睿能科技股份有限公司 | Power failure detection circuit of flat knitting machine and power failure detection method thereof |
| CN112601331A (en) * | 2020-11-02 | 2021-04-02 | 光华临港工程应用技术研发(上海)有限公司 | Lighting adjusting device and lighting apparatus based on thing networking |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008064539A (en) * | 2006-09-06 | 2008-03-21 | Mitsubishi Electric Corp | Electronic ammeter |
| CN101842970A (en) * | 2007-12-06 | 2010-09-22 | 英特赛尔美国股份有限公司 | System and method for improving inductor current sensing accuracy of a dc/dc voltage regulator |
| CN101865941A (en) * | 2009-01-13 | 2010-10-20 | 精工电子有限公司 | Voltage detection circuit |
| US20120235666A1 (en) * | 2008-06-18 | 2012-09-20 | Hioki Denki Kabushiki Kaisha | Voltage detecting apparatus and line voltage detecting apparatus |
| CN102998505A (en) * | 2011-09-14 | 2013-03-27 | 珠海格力电器股份有限公司 | Battery undervoltage detection circuit |
| CN202994960U (en) * | 2012-11-30 | 2013-06-12 | 衡阳风顺车桥有限公司 | Withstanding voltage tester |
-
2013
- 2013-09-12 CN CN2013104142882A patent/CN103472280A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008064539A (en) * | 2006-09-06 | 2008-03-21 | Mitsubishi Electric Corp | Electronic ammeter |
| CN101842970A (en) * | 2007-12-06 | 2010-09-22 | 英特赛尔美国股份有限公司 | System and method for improving inductor current sensing accuracy of a dc/dc voltage regulator |
| US20120235666A1 (en) * | 2008-06-18 | 2012-09-20 | Hioki Denki Kabushiki Kaisha | Voltage detecting apparatus and line voltage detecting apparatus |
| CN101865941A (en) * | 2009-01-13 | 2010-10-20 | 精工电子有限公司 | Voltage detection circuit |
| CN102998505A (en) * | 2011-09-14 | 2013-03-27 | 珠海格力电器股份有限公司 | Battery undervoltage detection circuit |
| CN202994960U (en) * | 2012-11-30 | 2013-06-12 | 衡阳风顺车桥有限公司 | Withstanding voltage tester |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104090152A (en) * | 2014-06-16 | 2014-10-08 | 福建睿能科技股份有限公司 | Power failure detection circuit of flat knitting machine and power failure detection method thereof |
| CN112601331A (en) * | 2020-11-02 | 2021-04-02 | 光华临港工程应用技术研发(上海)有限公司 | Lighting adjusting device and lighting apparatus based on thing networking |
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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 | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20131225 |