CN203573196U - Current signal converter circuit - Google Patents
Current signal converter circuit Download PDFInfo
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- CN203573196U CN203573196U CN201320726173.2U CN201320726173U CN203573196U CN 203573196 U CN203573196 U CN 203573196U CN 201320726173 U CN201320726173 U CN 201320726173U CN 203573196 U CN203573196 U CN 203573196U
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Abstract
The utility model relates to a current signal converter circuit which comprises the current signal input end, the current signal output end, the voltage signal output end, an adjustable constant current tube, a precision operation amplifier, a first resistor, a second resistor, a third resistor, a fourth resistor, a first capacitor and a second capacitor. The current signal input end is connected with the adjustable constant current tube and the current signal output end at the same time, one output terminal of the current signal output end is connected with the second resistor, the second resistor is connected with the forward input end of the precision operation amplifier, the other output terminal of the current signal output end is connected with the third resistor, the third resistor is connected with the backward input end of the precision operation amplifier, the two output ends of the current signal output end are connected with the first resistor and the first capacitor in parallel, the output end of the precision operation amplifier is connected with the voltage signal output end through the fourth resistor, and a sliding rheostat and the second capacitor are connected between the third resistor and the fourth resistor in parallel in a bridging mode. The current signal converter circuit is simple in structure and accurate and reliable in output data.
Description
Technical field
The utility model relates to current-voltage conversion circuit field, relates in particular to a kind of current signal converter circuit.
Background technology
During industry is manufactured, the sensor of 4-20mA current signal output is subject to numerous users' favor with long transmission distance, strong anti-interference performance.But, in transformation applications as pressure sensor signal in WY type rolling bearing pressing machine control system, control system sampled signal is generally used 0-5V voltage signal, therefore it is most important 4-20mA current signal need to be converted to 0-5V voltage signal, but because each sensor all exists certain deviation in signal minimum (4mA) and maximal value (20mA), in conventional change-over circuit, when sensor signal is minimum value (4mA) and maximal value (20mA), be not easy to obtain 0V voltage and 5V voltage, and circuit complexity, output data out of true, bring very large trouble to the use in later stage.
Utility model content
In view of this, be necessary to provide a kind of simple, and the output signal can accurately obtain sensor signal and be minimum value (4mA) and maximal value (20mA) time is the current signal converter circuit of 0V voltage and 5V voltage.
The utility model is to realize like this, a kind of current signal converter circuit, comprise current signal input end, current signal output end and voltage signal output end, also comprise capable of regulating constant current tube, precision operational-amplifier, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the first electric capacity and the second electric capacity, described current signal input end connects capable of regulating constant current tube and current signal output end simultaneously, a lead-out terminal of described current signal output end connects one end of the second resistance, the other end of the second resistance connects the positive input of precision operational-amplifier, another lead-out terminal of described current signal output end connects one end of the 3rd resistance, the other end of the 3rd resistance connects the reverse input end of precision operational-amplifier, two output terminals of described current signal output end be connected in parallel described the first resistance and the first electric capacity, one end of one end of described the first resistance and the first electric capacity is connected with the second resistance, and the other end of the other end of the first resistance and the first electric capacity is connected with the first electric capacity, the output terminal of described precision operational-amplifier connects voltage signal output end by the 4th resistance, between described the 3rd resistance and the 4th resistance, be provided with slide rheostat and the second electric capacity, described slide rheostat and the second Capacitance parallel connection are connected across between described the 3rd resistance and the 4th resistance.
Further, between described current signal input end and capable of regulating constant current tube, be provided with diode, described current signal input end connects the positive pole of diode, and capable of regulating constant current tube connects the negative pole of diode.
Further, described capable of regulating constant current tube is provided with adjustable resistance, and described adjustable resistance is connected with capable of regulating constant current tube by the 5th resistance.
The advantage of a kind of current signal converter circuit that the utility model provides is: the utility model is simple in structure, by the adjustable resistance on capable of regulating constant current tube and capable of regulating constant current tube is set, by regulating adjustable resistance, obtain accurate 0V voltage signal output, by precision operational-amplifier and slide rheostat are set, by regulating slide rheostat to make precision operational-amplifier enlargement factor, obtain accurate 5V voltage signal output, accurately reliable, be adapted at the transformation applications as pressure sensor signal in WY type rolling bearing pressing machine control system.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of a kind of current signal converter circuit of the utility model.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
Refer to Fig. 1, Fig. 1 is the circuit diagram of a kind of current signal converter circuit of the utility model.
Described a kind of current signal converter circuit, comprise current signal input end CJ2, current signal output end JC1 and voltage signal output end CJ4, also comprise capable of regulating constant current tube U3, precision operational-amplifier U4, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the first capacitor C 1 and the second capacitor C 2, described current signal input end CJ2 connects capable of regulating constant current tube U3 and current signal output end JC1 simultaneously, between described current signal input end CJ2 and capable of regulating constant current tube U3, be provided with diode D1, described current signal input end CJ2 connects the positive pole of diode D1, capable of regulating constant current tube U3 connects the negative pole of diode D1, a lead-out terminal of described current signal output end JC1 connects one end of the second resistance R 2, the other end of the second resistance R 2 connects the positive input IN+ of precision operational-amplifier U4, another lead-out terminal of described current signal output end JC1 connects one end of the 3rd resistance R 3, the other end of the 3rd resistance R 3 connects the reverse input end IN-of precision operational-amplifier U4, two output terminals of described current signal output end JC1 be connected in parallel described the first resistance R 1 and the first capacitor C 1, one end of one end of described the first resistance R 1 and the first capacitor C 1 is connected with the second resistance R 2, and the other end of the other end of the first resistance R 1 and the first capacitor C 1 is connected with the first capacitor C 1, the output terminal OUT of described precision operational-amplifier U4 connects voltage signal output end CJ4 by the 4th resistance R 4, between described the 3rd resistance R 3 and the 4th resistance R 4, be provided with slide rheostat RP1 and the second capacitor C 2, described slide rheostat RP1 and the second capacitor C 2 parallel connections are connected across between described the 3rd resistance R 3 and the 4th resistance R 4.
Described capable of regulating constant current tube U3 is provided with adjustable resistance RP2, and described adjustable resistance RP2 is connected with capable of regulating constant current tube U3 by the 5th resistance R 5, is convenient to regulate capable of regulating constant current tube U3.
In the utility model, by capable of regulating constant current tube U3 and adjustable resistance RP2, make the first resistance R 1 obtain accurate 0V voltage signal to be:
Adjusting adjustable resistance RP2 is 0 with minimum current signal I1 at A point stack after-current by capable of regulating constant current tube U3 acquisition electric current I 2, thereby produces 0V signal in the first resistance R 1, finally by precision operational-amplifier U4 output 0V voltage.
When signal maximum (20mA) is inputted, the voltage signal obtaining after the stack of A point electric current is: (20-I2) this signal of X250 mV is delivered to the in-phase end of precision operational-amplifier U4, adjusting slide rheostat RP1, is 5V thereby adjustment enlargement factor makes precision operational-amplifier U4 output voltage.
The utility model is simple in structure, practicality is high, by the adjustable resistance RP2 on capable of regulating constant current tube U3 and capable of regulating constant current tube U3 is set, by regulating adjustable resistance RP2, obtain accurate 0V voltage signal output, by precision operational-amplifier U4 and slide rheostat RP1 are set, by regulating slide rheostat RP1 to make precision operational-amplifier U4 enlargement factor, obtain accurate 5V voltage signal output, accurately reliable, be adapted at the transformation applications as pressure sensor signal in WY type rolling bearing pressing machine control system.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.
Claims (3)
1. a current signal converter circuit, comprise current signal input end CJ2, current signal output end JC1 and voltage signal output end CJ4, it is characterized in that, also comprise capable of regulating constant current tube U3, precision operational-amplifier U4, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the first capacitor C 1 and the second capacitor C 2, described current signal input end CJ2 connects capable of regulating constant current tube U3 and current signal output end JC1 simultaneously, a lead-out terminal of described current signal output end JC1 connects one end of the second resistance R 2, the other end of the second resistance R 2 connects the positive input IN+ of precision operational-amplifier U4, another lead-out terminal of described current signal output end JC1 connects one end of the 3rd resistance R 3, the other end of the 3rd resistance R 3 connects the reverse input end IN-of precision operational-amplifier U4, two output terminals of described current signal output end JC1 be connected in parallel described the first resistance R 1 and the first capacitor C 1, one end of one end of described the first resistance R 1 and the first capacitor C 1 is connected with the second resistance R 2, and the other end of the other end of the first resistance R 1 and the first capacitor C 1 is connected with the first capacitor C 1, the output terminal OUT of described precision operational-amplifier U4 connects voltage signal output end CJ4 by the 4th resistance R 4, between described the 3rd resistance R 3 and the 4th resistance R 4, be provided with slide rheostat RP1 and the second capacitor C 2, described slide rheostat RP1 and the second capacitor C 2 parallel connections are connected across between described the 3rd resistance R 3 and the 4th resistance R 4.
2. a kind of current signal converter circuit according to claim 1, it is characterized in that, between described current signal input end CJ2 and capable of regulating constant current tube U3, be provided with diode D1, described current signal input end CJ2 connects the positive pole of diode D1, and capable of regulating constant current tube U3 connects the negative pole of diode D1.
3. a kind of current signal converter circuit according to claim 1, is characterized in that, described capable of regulating constant current tube U3 is provided with adjustable resistance RP2, and described adjustable resistance RP2 is connected with capable of regulating constant current tube U3 by the 5th resistance R 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320726173.2U CN203573196U (en) | 2013-11-18 | 2013-11-18 | Current signal converter circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320726173.2U CN203573196U (en) | 2013-11-18 | 2013-11-18 | Current signal converter circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203573196U true CN203573196U (en) | 2014-04-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320726173.2U Expired - Fee Related CN203573196U (en) | 2013-11-18 | 2013-11-18 | Current signal converter circuit |
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| Country | Link |
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| CN (1) | CN203573196U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103558894A (en) * | 2013-11-18 | 2014-02-05 | 铜陵科达车辆装备有限责任公司 | Current signal converter circuit |
-
2013
- 2013-11-18 CN CN201320726173.2U patent/CN203573196U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103558894A (en) * | 2013-11-18 | 2014-02-05 | 铜陵科达车辆装备有限责任公司 | Current signal converter circuit |
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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: 20140430 Termination date: 20161118 |
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| CF01 | Termination of patent right due to non-payment of annual fee |