Constant current sink circuit controlled by external voltage
Source: InternetPublisher:张七岁 Keywords: Constant current voltage control absorption circuit external voltage Updated: 2021/03/30
Control the voltages at the two input terminals of the OP amplifier Ai to be equal. in current.
The voltage generated across the sensing resistor Ra is,. ． Ra,
compare this voltage with the control voltage EIiv, if E, IV>l. ． Rs, will make d. The output potential increases,
,. Increase.
A FET in Darlington connection with the current control transistor Trz is used for elimination.
, r The error caused by the base current, which flows out from the collector through the FET.
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