參數(shù)資料
型號(hào)： TDA7402
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
文件頁數(shù)： 14/59頁
文件大小： 512K
代理商： TDA7402
TDA7402
14/59
1.4.3 Loudness Order
Different shapes of 1st and 2nd-Order Loudness
Figure 4. 1st and 2nd Order Loudness @ Attn. = 15dB, f
P
=400Hz
1.4.4 Flat Mode
In flat mode the loudness stage works as a 0dB to -19dB attenuator.
1.5 SoftMute
The digitally controlled SoftMute stage allows muting/demuting the signal with a I
2
C-bus programmable slope.
The mute process can either be activated by the SoftMute pin or by the I
2
C-bus. This slope is realized in a spe-
cial S-shaped curve to mute slow in the critical regions (see Figure 5).
For timing purposes the Bit0 of the I
2
C-bus output register is set to 1 from the start of muting until the end of de-
muting.
Figure 5. Softmute-Timing
Note: Please notice that a started Mute-action is always terminated and could not be interrupted by a change of the mute -signal.
dB
Hz
-20.0
-15.0
-10.0
-5.0
0.0
10.0
100.0
1.0K
10.0K
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