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Voltage-controlled gain amplifier circuit diagram

2015-01-06 05:32  
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Voltage-controlled gain amplifier circuit diagram
1.53 voltage-controlled gain amplifier is connected to the FET input op amp between the two input ends, and it is used as a voltage-controlled resistor, the resistance changes linearly with the voltage, and the changing range is ten times square, and it has excellent control characteristics. The resistance depends on the op amp.