Partial voltage type negative feedback bias circuit

Published:2011/6/27 21:36:00 Author:Christina | Keyword: Partial voltage, negative feedback, bias circuit | From:SeekIC

This circuit is designed as one kind of bias circuit, the typical circuit is as shown in the figure. In this circuit, the transistor emitter is connected with the RE, and the base electrode is connected with the RB1 and RB2. Figure Partial voltage type negative feedback bias circuit The partial voltage type negative feedback bias circuit has two kinds of stable effects: 1. Through the partial voltage of the base resistance RB1 and RB2, this relation is founding: I2=I1-IB≈I1 UB=Ec-I1RB1 UB=I2xRB2 2.If you add the RE in this circuit, this circuit will have the function of current negative feedback temperature compensation. Because of the two stable functions, this partial voltage type negative feedback bias circuit has good stable function.



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