The basic form of two-stage amplifier voltage feedback circuit diagram

Published:2011/4/14 2:27:00 Author:Ecco | Keyword: basic form , voltage feedback , two-stage amplifier | From:SeekIC

The basic form of circuit diagram Figure 19-1 shows the most representative form of two-stage negative feedback amplifier circuit. In this circuit, the feedback voltage of the R1 connects to the input signal in series, so the circuit is in series input type. In the figure, the plate load impedances of R1 and V1 are series connected, on the other hand, the plate load impedances of R1 and V1 are parallel connected to R2. So the circuit is a current feedback circuit for V1, and a voltage feedback circuit for V2. In fact, the current feedback component of V1 is much smaller than the total voltage feedback component of V2, so the whole circuit is used as a voltage feedback circuit.



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