TDA7409 ST Microelectronics, TDA7409 Datasheet - Page 13

• Manufacturer Part Number: TDA7409
• Description: CARRADIO-SIGNAL-PROCESSOR
• Manufacturer: ST Microelectronics

1.7.4 DC Mode
In this mode the DC-gain is increased by 4.4dB. In addition the programmed center frequency and quality factor
is decreased by 25% which can be used to reach alternative center frequencies or quality factors.
Figure 11. Bass normal and DC Mode @ Gain = 14dB, f
Note: The center frequency, Q and DC-mode can be set fully independently.
1.8 Treble
There are two parameters programmable in the treble stage:
1.8.1 Attenuation
Figure 12 shows the attenuation as a function of frequency at a center frequency of 17.5kHz.
Figure 12. Treble Control @ f
15.0
12.5
10.0
7.5
5.0
2.5
0.0
10.0
  
  
  
 
 
 
 


 
C
= 17.5kHz
100.0
  
C
1.0K
 -
= 80Hz
  -
10.0K
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