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參數(shù)資料
| 型號(hào)： | HA12179F |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | Audio Signal Processer for Car Deck and Cassette Deck(Dolby B-type NR with PB Amp) |
| 中文描述： | 音頻信號(hào)加工者為汽車(chē)甲板和卡座（杜比B型鉛放大器星期日） |
| 文件頁(yè)數(shù)： | 14/40頁(yè) |
| 文件大?。?/td> | 259K |
| 代理商： | HA12179F |
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HA12179F
Rev.1, Apr. 1994, page 14 of 40
The Sensitivity Adjustment of Music Sensor
Adjusting MS AMP. gain by external resistor, the sensitivity of music sensor can set up.
×
1
×
1
TAI (L)
–
6dB
TAI (R)
26dB
L
·
R signal addition circuit
+
–
LPF
–
+
MS
VREF
FFI NOI MA
OUT
MSI MS
DET
25kHz
MS AMP.
100k
DET
MS OUT
D GND
D GND
R
L
R28
R27
R26
R25
C14
0.01
μ
+
C13
0.33
μ
V
CC
D V
CC
Microcomptuter
C28
4700P
R24
330k
I
L
Figure 5 Music Sensor Block Diagram
Gv1
Gv2
f
1
f
2
Gv
[dB]
10
100
1k
10k
25k
100k
f
3
FF or REV
f
4
Normal speed
f [Hz]
Figure 6 Frequency Responce
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