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TDA7419 Datasheet(PDF) 27 Page - STMicroelectronics |
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TDA7419 Datasheet(HTML) 27 Page - STMicroelectronics |
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27 / 40 page  TDA7419 Description of the audio processor 27/40 4.12 HPF applications For HPF applications, HPF filter is available for additional processing after the speaker control. It is a 2nd order butterworth highpass filter with selectable flat mode. Figure 22 shows the diagram of the HPF that includes an external RC network. Figure 22. HPF diagram 4.13 Output selector and mixing The output-selector allows the front and rear speakers to connect to different sources. The setup of the output selector is shown in Figure 24. A Mixing-stage is placed after the front speaker-attenuator and can be set to mixing-mode. Having a full volume-attenuator for the mix-signal, the stage offers a wide flexibility to adapt the mixing levels. Figure 23. Output selector ACIN /FILO SE3IN /AC2IN ACOUT /AC2OUT External RC network To output Gain Control From speaker BassL+BassR Subwoofer output Rear Front Second Main Mix_in Attenuator Attenuator Attenuator Subwoofer filter Attenuator |
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