ha12192f Renesas Electronics Corporation., ha12192f Datasheet - Page 13

• Manufacturer Part Number: ha12192f
• Description: Audio Signal Processor For Car Deck Decode Only Dolby B-type Nr With Pb Amp.
• Manufacturer: Renesas Electronics Corporation.

The Sensitivity Adjustment of Music Sensor
Adjusting MS Amp. gain by external resistor, the sensitivity of music sensor can set up.
The music sensor block diagram is shown in figure 4, and frequency response is shown in figure 5.
Note: Input impedance of MSI is 100 kΩ typical.
[dB]
G
V
DIN(L)
DIN(R)
G
G
+
−
−
+
V2
V1
SER/REP
10
Input Amp.
Input Amp.
−6dB
CEX2
REX2
2.7kΩ
1µF
Figure 4 Music Sensor Block Diagram
mode
REP
25kHz
LPF
Figure 5 Frequency Response
+
100
MSG
f
3
mode
SER
V
REX1
24kΩ
CEX1
0.01µF
−
+
HA12192F/HA12197F/HA12212F Series
90kΩ
MS Amp.
f [Hz]
Repeat mode
0.01µF
1k
MA
OUT
C8
f
1
Search mode (FF or REW)
ATT
330kΩ
MSI
R11
V
DET
CC
MS
DET
+
C6
0.33µF
10k
Rev.5, Jun. 1999, page 13 of 89
MSOUT
GND
25k
f
f
4
2
D V
Micro
computer
CC
R
100k
L
I
L