π-Type band pass filter

Absorption circuit

AC integrated coupler with phase equalizer

AC line filter

AC line filter

AC line filter with tapped balun winding

AC noise spike suppression circuit with parallel back-to-back fa

AC power passing RF choke with a 15 gauge wire

Active-type band-pass filter

Adaptive power line noise filter and switch for audio reproducti

Adaptive tracking notch filter system

Adjustable and selective electrical filters and methods of tunin

Alpha tantalum thin film circuit device

Amplifier composite triple beat (CTB) reduction by phase...

Amplitude correction of field coupled varactor tuned filters

Analog RC active filter

Annular composite capacitor/inductor with a switch across...

Antenna sharing device using mutually coupled resonant circuits

Apparatus and method for improving channel filter...

Apparatus for extracting the fundamental frequency from a comple