參數(shù)資料
型號(hào): TDA7416
廠商: 意法半導(dǎo)體
英文描述: CARRADIO SIGNAL PROCESSOR
中文描述: CARRADIO信號(hào)處理器
文件頁(yè)數(shù): 16/27頁(yè)
文件大?。?/td> 560K
代理商: TDA7416
TDA7416
16/27
1.9 AC-coupling
In some applications additional signal manipulations are desired. For this purpose an AC-coupling is
placed before the speaker(fader)-attenuators, which can be activated or internally shorted by I
2
C-Bus. In
short condition the input-signal of the speaker-attenuator is available at the AC-outputs. The input-imped-
ance of this AC-inputs is 50k . In addition there are Mix inputs available. With this inputs it is possible to
mix an external signal to every speaker with a mixing ratio of 50% (see figure 14).
The source of front and rear speaker can be set independently.
As source is choosable :
- internal dc coupling (not recommended)
- external ac coupling using ACin pins
Figure 15. AC/DC-coupling
1.10Front Speaker-Attenuator and Mixing
A Mixing-stage is placed after front speaker-attenuator and can be set independently to mixing-mode.
Having a full volume for the Mix-signal the stage offers a wide flexibility to adapt the mixing levels.
Figure 16. Output Selector
1.11Audioprocessor Testing
During the Testmode, which can be activated by setting bit I
2
of the subaddress byte
and
D
0
of the audio-
processor testing byte, several internal signals are available at the Mix pin. During this mode the input
resistance of 100kOhm is disconnected from the pin. The internal signals available are shown in the Data-
byte specification.
Vref
Vref
1
1
left channel
right channel
SWin
ACinL
ACoutL
SWout
Front Fader
RearFader
Subwoofer Fader
Rear selector
Highpass
Lowpass
fr
flat
fr
flat
1
Front
From MIXin
OutF
Volume
+15/-79dB
1dB step
Volume
+15/-79dB
1dB step
Highpass2
2
2
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