CCD for PAL decoder

Abstract

The ultrasonic glass delay line section of PAL color TV receiver is incorporated into an IC by using a CCD delay line. It is shown that it is possible to delay, demodulate, and matrix the chroma signal from the chrominance filter all in the charge domain in one complex CCD which is driven by clock pulses with phases according to the color subcarrier. The output signals are fed directly to the RGB output drivers. Thus the whole chroma section of a PAL-TV set consists only of one MOS-CCD-IC performing the color signal processing and one bipolar IC with the 4.4 MHz oscillator, PAL switch, etc., without external glass delay line and coils.