Bose CD-20 - Page 57

57
CD MECHANISM IC BLOCK DIAGRAMS
Input Interface
Infinity
Zero Detect
Timing
Control
Filter Calculate
Attenuation
Calulate
Block
Noise Shaper
Calculate
Block
PWM Data
Generation
Block
10
8
7
6 5
4
2
1
28
27
26
DIN
LRCI
ATTN
MODN
TSTN
CKO
XVSS
XTO
XTI
XVDO
AVDO4
LO
AVSSI
LON
AVDO2
AVDO3
RON
AVSS2
RO
18
19
20
21
22 23
24
25
9
11
12
13
3
14
15
16
17
DCKI
DFS1
DFS2
MUTEO
DS
RSTN
DVSS
DVDD
AVDO1
L
R
L
R
L
R
+
_
INTERUPT SIGNAL
GENERATION BLOCK
+
_
RESET SIGNAL
GENERATION BLOCK
5
2
3
4
1
Vcc
INT
___
RESET
_____
GND
_
+
A
_
+
B
1
2
3
4
5
6
7
8
V-
V+
IC 203/204 (NJM4560M)
Operational Amplifier
IC 604 (M62007FP)
IC 201 (SM5871AS) D/F and D/A Converter