Phase-Lock Television IF Amplifier-Video Detector

This paper describes a novel approach to a composite television IF system, integrated onto one silicon chip in a 16-lead DIP. The system performs synchronous video detection and phase detection, and uses a phase-lock loop to synchronize the IF to a locally generated 45.75 MHz reference signal. It includes a video IF amplifier, AGC generators, and a search oscillator which enhances the pull-in range of the phase-lock loop and eliminates the fine tuning in the television receiver.