Discrete parallel path modulation multiplexer

Distortion cancel circuit in FM stereo

Distortion correcting AM stereo receiver with non-flat AGC

Distortion correcting AM stereo receiver with non-flat AGC

Dual indicator circuit for tuning and stereo signals

Dual mode tone detector circuit

Dual purpose variable Q filter

Electronic circuit and process for creation of three-dimensional

Encoding for the FMX companding system

Equalizer apparatus

Filter arrangement for an audio companding system

FM Broadcast band demodulator/stereo decoder

FM Broadcasting system with transmitter identification

FM Channel separation adjustment

FM multiplex decoding

FM Noise reducing circuit

FM receiver

FM receiver and communication systems including same

FM signal processor

FM Stereo apparatus and method