STABILIZED_BIAS

Published:2009/6/25 22:03:00 Author:May | From:SeekIC

Simple voltage-feedback loop stabilizes bias on direct-coupled FET and bipolar transistor stages. Arrangement uses constant-current source a2 to maintain stable bias voltage on base of 03. By choosing proper resistor values, DC voltage feedback from emitter of bipolar is made to control constant-cur-rent value. Any change in drain current pro-duces opposite change in constant-current value, for stabilizing bipolar. Article gives de-sign equation.-H. T. Russell, DC Feedback Stabilizes Bias on FETTBipolar Pair, EDN Magazine, Nov.15,1970, p 51.



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