參數(shù)資料
型號(hào): HA12174
廠商: Hitachi,Ltd.
英文描述: Audio Signal Processor for Car Deck and Cassette Deck (Dolby B/C-type NR with PB Amp)
中文描述: 音頻信號(hào)處理器(杜比B / C型與鉛放大器為汽車甲板上午和卡座)
文件頁(yè)數(shù): 18/66頁(yè)
文件大小: 1116K
代理商: HA12174
HA12173 Series
Rev.1, Nov. 1992, page 18 of 66
Music Sensor Output (MS OUT)
As for the internal circuit of music sensor block, music sensor out pin is connected to the collector of NPN
Type directly, Output level will be “high” when sensing no signal. And output level will be “l(fā)ow” when
sensing signal.
Connection with microcomputer, design I
L
at 1 mA typ.
I
L
=
DV
CC
–MSOUT
Lo
*
R
L
* MSOUT
Lo
: Sensing signal (about 1 V)
Notes: 1. Supply voltage of MS OUT pin must be less than V
CC
voltage.
2. MS V
CC
pin and V
CC
pin are required the same voltage.
The Tolerances of External Components for Dolby NR-block
For adequate Dolby NR tracking response, take external components shown below.
R11
18 k
±2%
μ
C10
0.1
±10%
μ
C17
0.1
±10%
3
HA12173 Series (PB 1 Chip)
PB OUT
(L)
SS1
(L)
SS2
(L)
CCR
(L)
HLS
DET (L)
PB OUT
(R)
SS1
(R)
SS2
(R)
CCR
(R)
HLS
DET(R)
BIAS
LLS
DET(R)
LLS
DET (L)
R12
22 k
±2%
C7
2200 p
±5%
C6
2200 p
±5%
R13
560
±2%
C9
2200 p
±5%
C11
0.1
±10%
μ
C16
0.1
±10%
μ
C18
2200 p
±5%
C20
2200 p
±5%
C21
2200 p
±5%
R31
560
±2%
R32
22 k
±2%
37
36
35
34
33
6
7
9
10
11
32
8
Unit R:
C: F
Figure 6 Tolerances of External Components
PB Equalizer for Double Speed
PB equalizer can be design for double speed by using external components shown in figure 7. Application
data is shown in figure 8.
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