The choking phenomenon and the eliminating measure of operational amplifier circuit diagram

Published:2011/8/9 1:51:00 Author:Rebekka | Keyword: choking phenomenon , the eliminating measure, operational amplifier | From:SeekIC

When the integrated operational amplifier is choking, the amplifier circuit will lose the ability to zoom. It is equivalent to the signal which is blocked by the same op amp.For example, thevoltage follower will often occur choking as the width of the input and output voltage of the followeris the same. Its input signal width is ususlly large(when the follower is the output stage). If the op amp input stage bias voltage is less than the peak input signal peak, the peak of the input stage will turn to saturated. When the saturation occurs, the input and output voltage becomes the same phase, the negative feedback becomes a positive feedback. Obviously, the positive and negative feedback will make the input stage bein the saturated mode. The input signal cannot output normally, and the choking phenomenon will occur.



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