Current negative feedback bias circuit

Published:2011/6/28 1:29:00 Author:Christina | Keyword: Current, negative feedback, bias circuit | From:SeekIC

The current negative feedback bias circuit is as shown in the figure. The difference between this circuit and the fixed bias circuit is the semiconductor transistor emitter is connected with a resistance RE. The parameters of this circuit are: Ec=IERE+UBE+IBRB. As the EC power is constant, if the IERE increases, the UBE will decreases, so the IB decreases too. The process of the circuit stable quiescent operating point is: ↑-->Ic↑-->IE↑-->IERE↑-->UBE↓-->IB↓-->IC↓ Figure: Current negative feedback bias circuit



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