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TDA8214B датащи(PDF) 7 Page - STMicroelectronics |
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TDA8214B датащи(HTML) 7 Page - STMicroelectronics |
7 / 9 page Vcc1 2 To frame amplifier Frame sync pulse INPUT CURRENT COMPENSATION Figure 6 : Frame Oscillator Frame output amplifier This amplifier is able to drive directly the frame yoke. Its output is short circuit and overload pro- tected; it contains also a thermal protection. The frame blanking is detected by the frame fly- back generator. When the output voltage of the frame amplifier exceeds VCC2-2VBE, the pulse is detected. The line flyback detection is provided by a comparator which compares the input line flyback pulse to an internal reference. The burst gate pulse position is fixed by the external RC network (Pin 14). It is referenced to the middle of the line flyback. This stage will detect the coincidence between the line sync pulse (if present) and a 2 µs sampling pulse. This 2 µs pulse is positionned at the center of line sync pulse when the phase loop is locked. This sampled detection is stored by an external capacitor Pin 8. The identification output level is high when video signal is present. Important remark : minimum saw-tooth amplitude on Pin 13 has to be 2VPP (typ. : 2.5VPP). Vcc1 18 19 10 14 Line Flyback Input Frame Output YOKE Vcc1 RC SSC Output RC Network Σ 400 µ A Line Flyback Detection Frame Blanking Detection Burst gate pulse generator Figure 7 : Super Sandcastle Generator TDA8214B 7/9 |
Аналогичный номер детали - TDA8214B |
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Аналогичное описание - TDA8214B |
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