Variable Gain Amplifier controlled by voltage

Variable Gain Video AmplifierThis is Variable Gain Amplifier controlled by voltage circuit function as video amplifier, it use 3 Field Effect Transistor (FET) type U1897E. U1897E  FET can also be replaced with a 2N4091.

The tee attenuator provides for optimum dynamic linear range attenuation up to 100 dB, even at frequency = 10.7 MHz with proper layout.

Tags: 2N4091 circuit U1897E circuit Variable Gain Amplifier variable gain amplifier schematic video amplifier video amplifier circuit voltage controlled amplifier

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