variable gain amplifier schematic Archives - Amplifier Circuit Design https://amplifiercircuit.net/tag/variable-gain-amplifier-schematic Amplifier Project Schematic Diagram Sat, 24 Dec 2011 21:36:32 +0000 en-US hourly 1 103688205 Variable Gain Amplifier controlled by voltage https://amplifiercircuit.net/variable-gain-amplifier-controlled-by-voltage.html https://amplifiercircuit.net/variable-gain-amplifier-controlled-by-voltage.html#respond Sun, 25 Sep 2011 13:13:02 +0000 http://amplifiercircuit.net/?p=552 This is Variable Gain Amplifier controlled by voltage circuit function as video amplifier, it use 3 Field Effect Transistor (FET) […]

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]]> 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.

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