TDA7405_04 STMICROELECTRONICS [STMicroelectronics], TDA7405_04 Datasheet - Page 17

• Manufacturer Part Number: TDA7405_04
• Description: EQUALIZER CARRADIO SIGNAL PROCESSOR
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

5.8.2 Center Frequency
Figure 16 shows the four possible center frequencies 10k, 12.5k, 15k and 17.5kHz.
Figure 16. Treble Center Frequencies @ Gain = 14dB
5.9 EQ-Filter
There are two EQ-Filters present in the A631: one for the High-Frequency-Range and one for the Low-Frequen-
cy-Range with a certain overlap. They are programmable in center-frequeny (4 frequencies/octave), in Q(4 set-
tings) and in Attenuation (1dB-steps). In addition several configurations are possible to use the filters in the front-
or rear-path.
Table 6. Gain, Center Frequency and Quality Factor of Equalizer Filters
Gain
Center Frequency Filter 1
Center Frequency Filter 2
Quality Factor
15.0
12.5
10.0
7.5
5.0
2.5
0.0
10.0
Parameter
100.0
Min
300
-15
63
1
1.0K
4000
Max
840
15
4
10.0K
Unit
dB
Hz
Hz
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