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TDA7402 数据表(PDF) 35 Page - STMicroelectronics |
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TDA7402 数据表(HTML) 35 Page - STMicroelectronics |
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35 / 59 page  35/59 TDA7402 Figure 28. Internal stereoblend characteristics The gain can be programmed through 4 bits in the ”Stereodecoder-Adjustment”-byte. All necessary internal ref- erence voltages like REF5V are derived from a bandgap circuit. Therefore they have a temperature coefficient near zero. Figure 29. Relation between internal and external LEVEL-voltages for setup of Stereoblend 3.9 Highcut Control The highcut control set-up is similar to the stereoblend control set-up : the starting point VHCH can be set with 2 bits to be 42, 50, 58 or 66% of REF5V whereas the range can be set to be 17, 22, 28 or 33% of VHCH (see fig. 30). Figure 30. Highcut characteristics 70 20 |
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