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CA3224E датащи(PDF) 1 Page - Intersil Corporation |
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CA3224E датащи(HTML) 1 Page - Intersil Corporation |
1 / 6 page 1 ® FN1553.2 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright © Intersil Americas Inc. 2002. All Rights Reserved All other trademarks mentioned are the property of their respective owners. CA3224E Automatic Picture Tube Bias Control Circuit Description The CA3224E is an automatic picture tube bias control cir- cuit 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 cut- off changes. The CA3224E provides automatic continuous control of the cutoff current in each gun of a three-gun color CRT. From an input pulse amplitude proportional to the difference between the desired and the actual CRT cutoff, a gated sample/hold circuit generates a DC correction voltage which correctly biases the CRT driver circuit. The sample/hold bias correction takes place each frame following the vertical blanking. Figure 1 shows a block diagram of the CA3224E. The functions include three identical servo loop transconductance amplifiers with a sample/hold switch and buffer amplifier plus control logic, internal bias and a mode. 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 Pinout CA3224E (PDIP) TOP VIEW Part Number Information PART NUMBER TEMP. RANGE (oC) PACKAGE PKG. NO. CA3224E -40 to 85 22 Ld PDIP E22.4 1 11 10 9 8 7 6 5 3 2 4 22 12 13 14 15 16 17 18 19 21 20 CHANNEL 1 INPUT CHANNEL 1 FREQ COMPENSATION CHANNEL 2 INPUT CHANNEL 2 FREQ COMPENSATION CHANNEL 3 INPUT CHANNEL 3 FREQ COMPENSATION GROUND VERTICAL INPUT HORIZONTAL INPUT GRID PULSE OUTPUT CHANNEL 1 HOLD CAP CHANNEL 2 HOLD CAP CHANNEL 2 OUTPUT CHANNEL 3 HOLD CAP CHANNEL 1 OUTPUT CHANNEL 3 OUTPUT VREF BYPASS AUTO BIAS LEVEL ADJUST AUTO BIAS PULSE OUTPUT PROGRAM PULSE OUTPUT GROUND VCC Data Sheet October 2002 OBSO LETE PRODU CT NO RE COMM ENDE D REP LACE MENT |
Аналогичный номер детали - CA3224E |
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Аналогичное описание - CA3224E |
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