Variable gain amplifier circuit

Posted on Nov 10, 2015

Variable gain amplifier Shown is a variable gain amplifier. For fixing the input signal, the output signal amplitude of the controllable amplifier circuit.

Variable gain amplifier circuit
Click here to download the full size of the above Circuit.

The electrical main road is an operational amplifier, negative feedback circuit by changing the amount of feedback to change the gain of the amplifier, the figure having a base control terminal double gate field effect transistor PIX429D negative feedback control device, the control voltage -10 to - 2 V of the change between, making the output between 220 mV ~ 2.2 V change.

Leave Comment

characters left:

New Circuits



Popular Circuits

Continuity in Circuit Tester
Valve audio headphones Amplifier
Carrier-Current Receiver For Data Transmission
Lighting Circuits Connections for Interior Electrical Installations
5.3W Amplifier With Surround System
Wire Tracer (Transmitter)
TDA2030 35 watt audio amplifier circuit
The AmG©lie project
Nicad Charger Uses Voltage Cut-Out
tesla coils and high voltage
Gas flameout alarm circuit