PLL modulation circuit, radio transmission device, and radio...

Polar modulation transmission apparatus

Portable VHF receiver/tape recorder calibrator

Power control for a transmitter

Pre-processing apparatus for FM stereo overshoot elimination

Pre-processing apparatus for FM stereo overshoot elimination

Radio communication device and method

Radio frequency zero if direct down converter

Radio transmission system

Radio transmitter apparatus and method

Radio transmitter modulation control circuitry

Signal processing of an amplitude-modulated and/or...

System and method of phase modulation control in RF signal...

System for processing audio frequency information for frequency

Transmitter circuit and method of operation

Transmitter circuitry for a cellular phone

Transmitter having PLL circuit

Transmitting device limiting the out-of-band interferences

Two-transistor mixer

Variable bandwidth filtering and frequency converting system