參數(shù)資料
型號: HA12229F
廠商: Hitachi,Ltd.
英文描述: Audio Signal Processor for Car Deck(Decode only Dolby B-type NR with PB Amp.)
中文描述: 音頻信號處理器。為汽車甲板(只解碼杜比B型鉛放大器星期日)
文件頁數(shù): 13/51頁
文件大小: 304K
代理商: HA12229F
HA12228F/HA12229F
Rev.2, Dec. 2000, page 13 of 51
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.
+
+
TAI(R)
TAI(L)
Note: The impedance of MSI is 100k
.
C8
0.01
μ
F
C6
0.33
μ
F
R11
330k
MSOUT
REX2
CEX2
REX1
CEX1
+
MS
SER
MS
REP
MS
Amp.
×
1
MS
DET
MA
OUT
MSI
100k
90k
LPF
25kHz
DET
V
CC
DV
CC
L/R signal
addition
20dB
6dB
×
1
+
GND
R
L
I
L
Micro
computer
Figure 4 Music Sensor Block Diagram
G
V2
G
V1
10
100k
25k
10k
1k
f
3
f
4
f
2
f
1
f (Hz)
G
V
100
Repeat mode
Search mode
Figure 5 Frequency Response
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