Vacuum tube amplifier having grid as output and plate as input

Vacuum tube amplifier with selectable power devices

Vacuum tube and MOSFET transimpedance amplifier

Vacuum tube audio amplifying circuit

Vacuum tube circuit

Vacuum tube circuit

Vacuum tube differential preamplifier having a transformer with

Vacuum tube power amplifier switchable between push-pull and...

Vacuum tube replacement device, circuit and system

Varactor compensation in amplifier circuits

Variable amplifier for RF input stage

Variable bias control for switch mode RF amplifier

Variable capacitor circuit and integrated circuit containing...

Variable characteristics amplifier circuit

Variable control of electronic power supplies

Variable control of electronic power supplies

Variable decision threshold apparatus

Variable distortion limiter using clip detect predictor

Variable electronic impedance circuit

Variable emitter degeneration gain-controlled amplifier