Variable electronic impedance circuit

Variable feedback circuits and methods

Variable gain alternating voltage amplifier

Variable gain amplifier

Variable gain amplifier

Variable gain amplifier

Variable gain amplifier

Variable gain amplifier

Variable gain amplifier circuits

Variable gain amplifier with adjustable upper frequency limit

Variable resistor array and amplifier circuit

Variable response notch filter for machine resonance elimination

Variable tuning and feedback on high power microwave transistor

Variable-gain constant-bandwidth transimpedance amplifier

Variable-gain constant-bandwidth transimpedance amplifier

Variable-gain constant-bandwidth transimpedance amplifier

Variable-impedance reference circuit and varying method

Voice frequency RC active filter

Voltage controlled filter

Voltage follower with pull-apart conector