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TDA9207 датащи(PDF) 8 Page - STMicroelectronics |
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TDA9207 датащи(HTML) 8 Page - STMicroelectronics |
8 / 22 page TDA9207 8/22 4.11.2 DC Coupling with cut-off controls on Video Amplifier (with TDA9533/ 9530, Figure 6) The functioning and programming of the TDA9207 are the same as for the previous mode, except for the cut-off control which is now performed via the Video amplifier cut-off input . In AC coupling and DC coupling with cut-off con- trol, bits 2, 3 and 4 in Register 9 must be set to 1. 4.11.3 DC Coupling Mode (Figure 7) This is the most commonly used configuration en- abling to build a powerful video system on a small PCB Board and giving a substantial cost saving compared with any other solution available on the market. The preamplifier outputs control directly the cut-off levels. The output DC level (VDC) is adjusted independ- ently for each channel from 0.5 V to 2.5 V via reg- isters 10, 11 and 12. In DC coupling mode, bit 2 must be set to 1 and bit3 to 0 in Register 9. 4.11.4 DC Coupling with feedback mode (Fig. 8) In this mode, the feedback voltage issued from the cathode is sent to the TDA9207. This voltage is compared to a reference from the cut-off DC level DAC by the sample and hold circuit who also con- trols the DC voltage of the feedback input in a range of 0.5 V to 2.5 V. Each channel is independently controlled via Reg- isters 10, 11 and 12. In DC coupling with feedback mode, bit 2 and bit 4 must be set to 0 in Register 9. Figure 5. AC Coupling Figure 6. DC Coupling with Cut-off Control TDA9207 DC LEVEL (4bits) 0.5V to 2.35V CUT-OFF 1,2,3 DC LEVEL 0.17V to 4.6V(8bits) Pins CRT Driver CRT Pins15-16-22 Cut-off Control 17-19-21 TDA9207 DC LEVEL (4bits) 0.5V to 2.35V CUT-OFF 1,2,3 DC LEVEL 0.17V to 4.6V (8bits) Pins 15-16-22 Pins 17-19-21 TDA9533/9530 CRT |
Аналогичный номер детали - TDA9207 |
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Аналогичное описание - TDA9207 |
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