TDA7402 datasheet(30/71 Pages) STMICROELECTRONICS

30 / 71 page

Audioprocessor part

TDA7402

30/71

Figure 21.

Application 2 using internal highpass and external stereo low pass filter

Figure 22.

Application 3 using pure external filtering (e.g. DSP)

4.14

Speaker attenuator and mixing

A mixing-stage is placed after each speaker attenuator and can be set independly to mixing

mode. Having a full volume for the mix signal the stage offers a wide flexibility to adapt the

mixing levels.

VOICE BAND

BANDPASS

EXTERNAL

LOWPASS

BASS-FILTER

LOWPASS

220nF

MS MONO

MAIN SOURCE

RIGHT CHANNEL

MAIN SOURCE

SPEAKER FRONT

SWIN

ACINR

ACINF

OFF/ON

ACOUT

SPEAKER REAR

SPEAKER SUBWOOFER

D00AU1157

LEFT CHANNEL

SECOND SOURCE

25K

50K

25K

SEC.S MONO

PROGRAMMING

5/0xxxxxxx

7/xxxxx1xx

10/xxxx11xx

12/1010xxxx

VOICE BAND

BANDPASS

EXTERNAL

FILTERING

BASS-FILTER

LOWPASS

220nF

MS MONO

MAIN SOURCE

RIGHT CHANNEL

MAIN SOURCE

SPEAKER FRONT

SWIN

ACINR

ACINF

OFF/ON

ACOUT

SPEAKER REAR

SPEAKER SUBWOOFER

D00AU1163

LEFT CHANNEL

SECOND SOURCE

25K

50K

25K

SEC.S MONO

220nF

PROGRAMMING

5/1xxxxxxx

7/xxxxx0xx

10/xxxx11xx

12/1010xxxx

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