VOLTAGE_CONTROLLED_GAIN

Published:2009/6/25 21:32:00 Author:Jessie | From:SeekIC

2N5457 FET acts as voltage-variable resistor between differential inputterminals of opamp. Resistance vat-iation is linear with voltage over several decades of resistance, to give excellent electronic gain control. Values of resistors depend on opamp used.- FET Databook, National Semi-conductor. Santa Clara, CA, 1977, p 6-26-6-36.



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