CN203745526U - Voltage measuring circuit - Google Patents
Voltage measuring circuit Download PDFInfo
- Publication number
- CN203745526U CN203745526U CN201420136359.7U CN201420136359U CN203745526U CN 203745526 U CN203745526 U CN 203745526U CN 201420136359 U CN201420136359 U CN 201420136359U CN 203745526 U CN203745526 U CN 203745526U
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- CN
- China
- Prior art keywords
- resistance
- resistor
- voltage
- triode
- measuring circuit
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Measurement Of Current Or Voltage (AREA)
Abstract
The utility model provides a voltage measuring circuit comprising a voltage input end. The voltage input end is connected with one end of a resistor R2 and one end of a resistor R1. The other end of the resistor R1 is connected with one end of a resistor R4 and the positive end of a diode D1 and is grounded. The other end of the resistor R4 is connected with the inverting input end of an operation amplifier OP1 and one end of a resistor R5. The negative end of the diode D1 is connected with one end of a resistor R3 and the base electrode of a triode Q1. The other end of the resistor R3 is connected with the output end of the operation amplifier OP1. The other end of the resistor R5 is connected with the emitting electrode of the triode Q1 and one end of a resistor R7. The collecting electrode of the triode Q1 is connected with the positive electrode of a power supply. The other end of the resistor R2 is connected with one end of a resistor R6 and the in-phase input end of the operation amplifier OP1. The other end of the resistor R6 is connected with one end of the resistor R1 and the other end of the resistor R7. The other end of the resistor R1 is grounded. A problem that voltage cannot be directly measured is solved by the voltage measuring circuit.
Description
Technical field
The utility model relates to a kind of tension measuring circuit.
Background technology
Existing in the design of circuit board, often need to measure certain any voltage, as cell voltage is measured, but due to the reason of putting of structural member, components and parts, be difficult to directly measure with instrument.The circuit that we just need to design a kind of indirect measuring voltage so records voltage.
Summary of the invention
The technical problems to be solved in the utility model, is to provide a kind of tension measuring circuit, solves the problem that existing voltage cannot directly be measured.
The utility model is achieved in that
A kind of tension measuring circuit, comprise voltage input end, described voltage input end is connected with one end of resistance R 2 and one end of resistance R 1, the other end of resistance R 1 is connected with one end of resistance R 4 and the anode of diode D1 and ground connection, the other end of resistance R 4 is connected with the inverting input of amplifier OP1 and one end of resistance R 5, the negative terminal of diode D1 is connected with one end of resistance R 3 and the base stage of triode Q1, the other end of resistance R 3 is connected with the output terminal of amplifier OP1, the other end of resistance R 5 is connected with the emitter of triode Q1 and one end of resistance R 7, the collector of triode Q1 is connected with positive source, the other end of resistance R 2 is connected with the in-phase input end of resistance R 6 one end and amplifier OP1, the other end of resistance R 6 is connected with one end of resistance R 1 and the other end of resistance R 7, the other end ground connection of resistance R 1.
The utility model has the advantage of: need not directly measure to the voltage of voltage input end the voltage that can learn this voltage input end.
Brief description of the drawings
The utility model is further described with reference to the accompanying drawings in conjunction with the embodiments.
Fig. 1 is structural representation of the present utility model.
Embodiment
Refer to shown in Fig. 1, the utility model provides a kind of tension measuring circuit, comprise voltage input end, described voltage input end is connected with one end of resistance R 2 and one end of resistance R 1, the other end of resistance R 1 is connected with one end of resistance R 4 and the anode of diode D1 and ground connection, the other end of resistance R 4 is connected with the inverting input of amplifier OP1 and one end of resistance R 5, the negative terminal of diode D1 is connected with one end of resistance R 3 and the base stage of triode Q1, the other end of resistance R 3 is connected with the output terminal of amplifier OP1, the other end of resistance R 5 is connected with the emitter of triode Q1 and one end of resistance R 7, the collector of triode Q1 is connected with positive source, the other end of resistance R 2 is connected with the in-phase input end of resistance R 6 one end and amplifier OP1, the other end of resistance R 6 is connected with one end of resistance R 1 and the other end of resistance R 7, the other end ground connection of resistance R 1.
In actual applications, we are assumed to be Vi voltage input end voltage, and the in-phase input end input voltage of amplifier OP1 is V1, and negative pole feedback voltage is V2, and the emitting stage voltage of Q1 triode is V3.The OP1 in-phase input end voltage over the ground voltage of bleeder circuit is V4.According to operational amplification circuit characteristic, input end both positive and negative polarity no current, can myopia think that V1 equates with V2, according to being calculated as Vi=((V1 – V4)/R6) * R2+V1; V3=(V2/R4) * R5+V2; V1=V2.We can be arranged to R2 with R6 same numerical value, the same numerical value of R4 and R5, so, just can be similar to and think, it is only poor that the input voltage Vi of battery equals the numerical value of V3 and V4, and in the time of concrete application, we only need to obtain V3 point voltage so, and the V4 voltage of ordering, just can subtract each other the voltage Vi that obtains input point by V3 and V4 voltage.
The above embodiment, it is preferred embodiments of the present utility model, be not to limit the utility model practical range, the equivalence of doing according to structure, feature and principle described in the utility model claim therefore all changes or modifies, and all should comprise in the utility model patent claim.
Claims (1)
1. a tension measuring circuit, it is characterized in that: comprise voltage input end, described voltage input end is connected with one end of resistance R 2 and one end of resistance R 1, the other end of resistance R 1 is connected with one end of resistance R 4 and the anode of diode D1 and ground connection, the other end of resistance R 4 is connected with the inverting input of amplifier OP1 and one end of resistance R 5, the negative terminal of diode D1 is connected with one end of resistance R 3 and the base stage of triode Q1, the other end of resistance R 3 is connected with the output terminal of amplifier OP1, the other end of resistance R 5 is connected with the emitter of triode Q1 and one end of resistance R 7, the collector of triode Q1 is connected with positive source, the other end of resistance R 2 is connected with the in-phase input end of resistance R 6 one end and amplifier OP1, the other end of resistance R 6 is connected with one end of resistance R 1 and the other end of resistance R 7, the other end ground connection of resistance R 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420136359.7U CN203745526U (en) | 2014-03-25 | 2014-03-25 | Voltage measuring circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420136359.7U CN203745526U (en) | 2014-03-25 | 2014-03-25 | Voltage measuring circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203745526U true CN203745526U (en) | 2014-07-30 |
Family
ID=51345311
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420136359.7U Expired - Fee Related CN203745526U (en) | 2014-03-25 | 2014-03-25 | Voltage measuring circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203745526U (en) |
-
2014
- 2014-03-25 CN CN201420136359.7U patent/CN203745526U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140730 Termination date: 20150325 |
|
| EXPY | Termination of patent right or utility model |