TDA7412 Datasheet, PDF (20/56 Pages) STMicroelectronics – CARRADIO SIGNAL PROCESSOR

TDA7412
1.12 Subwoofer
Several different applications are possible with the Subwoofer-circuit:
1. Subwoofer-Filter OFF
a. Main-source stereo (AC-coupled)
b. Second-source stereo (DC-coupled)
c. Main-source mono-differential (DC-coupled)
d. Second-source mono-differential (DC-coupled)
2. Subwoofer-Filter ON
a. Main-source mono-differential (DC-coupled)
b. Second-source mono-differential (DC-coupled)
c. Center-Speaker-Mode (filtered mono signal at SWL, unfiltered mono signal at SWR)
In all applications the phase of the output-signal can be configured to be 0° or 180° . In the Center-Speaker-
Mode only at the filtered output the phase is changed.
Figure 16. Application1 using internal Highpass- and mono Low-pass-Filter
PROGRAMMING
5/1xxxxxxx
7/xxxxx1xx
10/xxxx10xx
12/1010xxxx
220nF 220nF
ACINF ACOUT ACINR
SWIN
MAIN SOURCE
LEFT CHANNEL
BASS-FILTER
VOICE BAND
BANDPASS
MAIN SOURCE
RIGHT CHANNEL
SECOND SOURCE
LEFT CHANNEL
SECOND SOURCE
25K
MS MONO
50K
50K 50K
25K
LOWPASS
25K
SEC.S MONO
25K
OFF/ON FC
SPEAKER FRONT
SPEAKER REAR
SPEAKER SUBWOOFER
D00AU1156
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