.pi./4 differential encoding for digital cellular mobile systems

16 QAM modulator and method of 16 QAM modulation

16-QAM Modulator with PLL amplification devices

90° phase generator

Acoustooptic modulation and deflection

Acoustooptic modulation device capable of avoiding impedance mis

Acoustooptical modulator and/or deflector

Active 90-degree phase shifter with LC-type emitter...

Active phase and amplitude modulator

Adaptive delta modulation system

Adaptive delta modulation system for correcting mistracking

Adaptive digital delta modulation for voice transmission

Adaptive quantizer apparatus using training mode

Adaptive switching speed control for pulse width modulation

Adaptively self-correcting modulation system and method

AGC Circuit with level-compensating input

Agile beam control of optical phased array

AM pulse duration modulator

AM Stereo transmitter

AM transmitter with an offset voltage to the RF stage to compens