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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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TDA7406 데이터시트(PDF) 25 Page - STMicroelectronics |
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TDA7406 데이터시트(HTML) 25 Page - STMicroelectronics |
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25 / 64 page  TDA7406 Description of the audioprocessor part 25/64 Figure 15. Spectrum analyzer block diagram Figure 16. Timing spectrum analyzer 4.9 AC-coupling In some applications additional signal manipulations are desired. For this purpose an AC- coupling is placed before the speaker-attenuators, which can be activated or internally shorted by I²C-Bus. In short condition the input-signal of the speaker-attenuator is available at the AC-outputs. The input-impedance of this AC-inputs is 50k Ω. In addition there are Mix In inputs available. With this inputs it is possible to mix an external signal to every speaker with a mixing ratio of 50% (see Figure 17). The source of front and rear speaker can be set independently. As source is possible to choose: – internal dc coupling (not recommended) – external ac coupling using ACIn pins – external ac coupling using MixIn pins – mixing of ACIn and MixIn pins (mixing ratio: 50%) If the MixIn pins of the rear speaker are not used this inputs can be used as mixing inputs for the internal subwoofer filter. |
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