Adaptive modulation scheme with simultaneous voice and data...

AM modulated wave eliminating circuit

Analog signal coding and transmission apparatus and method capab

Analog/digital integrated subscriber circuit

Analog/digital receiver

Apparatus for providing a multi-mode interface between a...

Band insertion and precancellation technique for simultaneous co

Band insertion and precancellation technique for...

Baud-rate-independent ASVD transmission built around G.729 speec

Burst serial tone waveform signaling method and device for squel

Carrier based data operated squelch

Data muting method and apparatus using delay circuits for commun

Digital to analogue converter implementation

Dual antenna receiver

Dual mode amplifier network having an isolator in a digital path

Dual mode analog and digital cellular phone

Dual mode radiotelephone modulator

Dual-mode communications processor

Dual-mode radio communication device having function for...

Dual-mode radiotelephone apparatus for digital or analog...