Block Diagram - Onkyo NC-500 Service Manual

QQ
3 7 63 1515 0
BLOCK DIAGRAM AND DESCRIPTION OF IC - 6
Q781:BU1923
RDS DECODER

Block diagram

2.2 F
1
TE
L 13942296513
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100k
MUX
(4)
270p
120k
100k
anti-aliasing
filter
(3)
Vref
V
DD1
(5)
1 Analog
Power supply
V
(6)
SS1
PLL
57kH
Z
(12)
V RDS/ARI
DD2
2
Digital
Power supply
(11)
V
SS2
Reference
clock
(13) (14)
XI
XO
4.332MH
Z
33pF 33pF
3 3
16 15
1 2
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8
8th Switched
capacitor filter
Bi-phase
PLL
decoder
1187.5Hz
Q Q
3 6 7 1 3
1 : V and V are separated within the IC.
DD1 DD2
2 : Have V (digital power supply) of a sufficiently low impedance.
DD2
3 : Match the capacitor constants with the crystal manufacturer.
14 13 12 11
4 6
3 5
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2 9 9 4 2 8
560p
CMP
(7) (8)
V
SS3
comparator
RCLK
(16)
QUAL
(1)
RDATA
(2)
Differential
decoder
1 5 0 5 8 2 9 9 4
Measurement
circuit
(10) (9)
T2
T1
9
10
8
7
m
co
NC-500
9 9
2 8 9 9