TDA7407_07 Datasheet, PDF (24/46 Pages) STMicroelectronics – Advanced car signal processor

Multipath detector
TDA7407
AC Outputs and the AC Input could be used as additional stereo inputs. The input
impedance of the AC Inputs is always 50KΩ.
5.1.20
Speaker Attenuator
The speaker attenuators have exactely the same structure and range like the volume stage.
Figure 9. Bass control @ fc = 80Hz, Q = 1 Figure 10. Bass center @ Gain = 14dB, Q =1
15.0
10.0
5.0
0.0
-5.0
-10.0
-15.0
10.0
100.0
1.0K
10.0K
15.0
12.5
10.0
7.5
5.0
2.5
0.0
10.0
100.0
1.0K
10.0K
Figure 11. Bass quality factors @ Gain =14dB, Figure 12. Bass normal and DC mode @ Gain
fc = 80Hz
= 14dB, fc = 80Hz
15.0
12.5
10.0
7.5
5.0
2.5
0.0
10.0
100.0
1.0K
10.0K
15.0
12.5
10.0
7.5
5.0
2.5
0.0
10.0
100.0
1.0K
10.0K
Note: In general the center frequency, Q and DC-mode can be set
independently. The exception from this rule is the mode (5/xx1111xx)
where the center frequency is set to 150Hz instead of 100Hz.
24/46