Description

The Harris CA3217E (Note) is a monolithic silicon integrated circuit. It contains all the required circuit functions between the video detector and the picture tube RGB driver stages of a color television receiver. The CA3217E decodes the chrominance signals and then produces three different color signals that are internally combined with the luminance to develop the RGB signals. The picture saturation, hue and brightness DC controls are externally adjustable by the viewers. The AFPC, ACC, Dynamic flesh control, Beam limiting and Gate black level (Brightness) control are servo loops used to stabilize the RGB output and reduce frequent manual adjustment. The automatic beam limiter circuit reduces picture contrast and brightness to prevent excessive drive output at the picture tube.

Features

• All Chroma Processing and Demodulating Circuitry on a Single Chip in a 28 Lead Plastic Package

• Phase Locked Subcarrier Regeneration Utilizing Sample and Hold Techniques

• Supplementary ACC with Overload Detector to Prevent Over Saturation of the Picture Tube

• Linear DC Controls for Chroma Gain and Tint

• Dynamic “Flesh Correction” - Corrects Purple and Green Flesh Colors without Affecting Primary Colors

• Balanced Chroma Demodulators with Low Output Impedance for Direct Coupling

• Internal RF Filtering

• Requires Few External Components

• Automatic Beam Limiter

• Chroma Luminance Tracking Picture Control