TDA7405 Datasheet, PDF (30/56 Pages) STMicroelectronics – EQUALIZER CARRADIO SIGNAL PROCESSOR

TDA7405
MULTIPATH DETECTOR
Features:
s internal 19kHz band-pass filter
s programmable band-pass- and rectifier-gain
s selectable internal influence on Stereoblend and/or Highcut
Table 5. ELECTRICAL CHARACTERISTICS
Symbol
Parameter
Test Conditions
Min. Typ. Max. Unit
f_CMP Center frequency of Multipath- stereodecoder locked on Pilottone
19
kHz
Bandpass
G_BPMP Bandpass Gain
G1
G2
6
dB
12
dB
G3
16
dB
G4
18
dB
G_RECTMP Rectifier Gain
G1
7.6
dB
G2
4.6
dB
G3
0
dB
I_CHMP Rectifier Charge Current
0.25
µA
0.5
I_DISMP Rectifier Discharge Current
4
mA
Quality Detector
A
Multipath Influence Factor
00
0.70
01
0.85
10
1.00
11
1.15
4 FUNCTIONAL DESCRIPTION OF STEREODECODER
Figure 25. Blockdiagram of the Stereodecoder
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