High-stability and high-precision current source circuit
A high-precision, current source technology, applied in the direction of adjusting electrical variables, control/regulating systems, instruments, etc., can solve the problems of poor current accuracy, unstable output current range, long response time, etc., to improve control accuracy and efficiency. , the effect of high-precision current source output
Inactive Publication Date: 2018-06-29
XIAN AVIATION COMPUTING TECH RES INST OF AVIATION IND CORP OF CHINA
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The invention belongs to the field of on-board computer interfaces, and relates to a high-stability and high-precision current source circuit. The current source circuit includes a D/A converter, a first operational amplifier OP1, a second operational amplifier OP2, a first field effect transistor V1, a second field effect transistor V2 and a diode V3. The diode V3 is located among the second operational amplifier OP2, the resistor R4 and a power supply +15V, so that the second operational amplifier OP2 avoids a nonlinear region when the circuit outputs small current. The connection mode of the first operational amplifier OP1 is a positive feedback mode, and the output end of the first operational amplifier OP1 is connected with the first field effect transistor V1.
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Positive feedbackOnboard computer +9
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