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TDA7402 Datasheet(PDF) 29 Page - STMicroelectronics

Part # TDA7402
Description  Car radio signal processor
PDF  71 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TDA7402 Datasheet(HTML) 29 Page - STMicroelectronics

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TDA7402
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4.13
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 20.
Application 1 using internal highpass and mono low pass filter
VOICE BAND
BANDPASS
BASS-FILTER
LOWPASS
220nF
220nF
MS MONO
MAIN SOURCE
RIGHT CHANNEL
MAIN SOURCE
SPEAKER FRONT
SWIN
ACINR
ACINF
OFF/ON
FC
ACOUT
SPEAKER REAR
SPEAKER SUBWOOFER
D00AU1156
LEFT CHANNEL
LEFT CHANNEL
SECOND SOURCE
SECOND SOURCE
25K
50K
50K
50K
25K
25K
25K
SEC.S MONO
PROGRAMMING
5/1xxxxxxx
7/xxxxx1xx
10/xxxx10xx
12/1010xxxx



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