Wide Dynamic Range Gain Control Amplifier Circuit

Published:2011/5/5 23:56:00 Author:Joyce | Keyword: Wide, Dynamic Range, Gain, Control, Amplifier | From:SeekIC

Wide Dynamic Range Gain Control Amplifier Circuit is shown in the graph below.Experience has proved that when using FET as variable resistor to control the amplifier's gain, if the input signal is 1% of the pinch-off voltage, there will be 1% distortion . And in the feedback circuit, if one uses two resistances and a field-effect tube to constitute a T network, the signals could be added to the field-effect tube after being reduced by R1, R2. Therefore it is able to control sizable signals.



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