HA12173 Series
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 “low” when
sensing signal.
Connection with microcomputer, design IL at 1 mA typ.
IL
=
DVCC
– MSOUTLo *
RL
* MSOUTLo: Sensing signal (about 1 V)
Notes: 1. Supply voltage of MS OUT pin must be less than VCC voltage.
2. MS VCC pin and VCC 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.
BIAS
3
R11
18 k
±2%
R32
22 k
±2%
C21
2200 p
±5%
C20
2200 p
±5%
R31
560
±2%
C18
2200 p
±5%
C17
0.1 µ
±10%
C16
0.1 µ
±10%
37
36
35
34
33
32
PB OUT SS1
SS2
CCR
HLS
LLS
(L)
(L)
(L)
(L)
DET (L) DET (L)
HA12173 Series (PB 1 Chip)
PB OUT SS1
SS2
CCR
HLS
LLS
(R)
(R)
(R)
(R)
DET(R) DET(R)
6
7
8
9
10
11
R12
22 k
±2%
C7
2200 p
±5%
C6
2200 p
±5%
R13
560
±2%
C9
2200 p
±5%
C10
0.1 µ
±10%
C11
0.1 µ
±10%
Figure 6 Tolerances of External Components
Unit R: Ω
C: F
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.
Rev.1, Nov. 1992, page 18 of 66