CA3224E - Intersil Corporation

CA3224E Automatic Picture Tube Bias Control Circuit

The CA3224E is an automatic picture tube bias control circuit used in color TV receiver CRT drive circuits. It is used to provide dynamic bias control of the grey scale both initially and over the CRT operating life, compensating for CRT cutoff changes. The CA3224E provides automatic continuous control of the cutoff current in each gun of a three-gun color C.

Features

• Automatic Picture Tube Bias Cutoff Control
• Automatic Background Color Balance
• Eliminates Grey Scale Adjustments
• Compensates for Cathode-to-Heater Leakage
• Electrostatic Protection on All Pins
• Servo Loop Design
• Wide Dynamic Range
• Three-Gun Control
• Minimal External Components Part Number Information PART NUMBER CA3224E TEMP. RANGE (oC) -40 to 85 PACKAGE 22 Ld PDIP PKG. NO. E22.4 Pinout CA3224E (PDIP) TOP VIEW GROUND CHANNEL 1 INPUT CHANNEL 1 FREQ COMPENSATION CHANNEL 2 INPUT CHANNEL 2 FREQ COMPENSATION CHANNEL 3 INPUT CHANNEL 3 FREQ COMPENSATION VERTICAL INPUT GROUND HORIZONT.