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STV9211 数据表(PDF) 16 Page - STMicroelectronics |
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STV9211 数据表(HTML) 16 Page - STMicroelectronics |
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16 / 37 page ![]() Functional description STV9211 16/37 2.11 Output stage The overall waveforms of the output signal are shown in Figure 11. The three output stages are large bandwidth output amplifiers able to deliver up to 4.4 VPP for 0.7 VPP video signal. When a high level is applied on the BLK input (Pin 20), the three outputs are forced to “Infra Black” level (Vib) thanks to a sample and hold circuit (described below). The black level is the output voltage outside the blanking pulse when no video input signal is available (see Figure 11 ). Figure 11: Signal waveforms HS (Pin 19) BPCP BLK Video IN FBLK OSD IN Video OUT black-level Infra-black OCL level |
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