DC small current constant-current source and calibration method thereof
A technology of constant current source and small current, applied in the field of current source, can solve the problems of output current noise, etc., and achieve the effect of solving output current noise, eliminating noise, and good constant current characteristics
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The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings.
As shown in Figure 2, the DC small current constant current source includes a voltage source, a differential amplifier circuit, a V / I conversion circuit, a current output terminal and a feedback circuit. The voltage source is connected in series with the differential amplifier circuit and outputs voltage to the differential amplifier circuit, the differential amplifier circuit is connected in series with the V / I conversion circuit, and the V / I conversion circuit generates current and outputs it through the current output terminal. After the feedback circuit samples the output current of the V / I conversion circuit, the feedback voltage signal and the output voltage of the voltage source are superimposed as the input of the differential amplifier circuit, and the output voltage of the feedback circuit is used as the following output voltage of the curre...
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