Block Diagram - Onkyo NC-500 Service Manual

BLOCK DIAGRAM AND DESCRIPTION OF IC - 6
Q781:BU1923
RDS DECODER

Block diagram

MUX
(4)
270p
120k
(3)
Vref
2.2 F
V
DD1
(5)
1
V
(6)
SS1
1 (12)
V
DD2
2
Power supply
(11)
V
SS2
XI
33pF
3
100k
100k
anti-aliasing
filter
Analog
Power supply
PLL
57kH
Z
RDS/ARI
Digital
Reference
clock
(13) (14)
XO
4.332MH
Z
33pF
3
16 15 14
1 2
3
V
SS3
8th Switched
capacitor filter
Bi-phase
PLL
decoder
1187.5Hz
Measurement
circuit
(10)
T1
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.
13 12 11 10
4 6
5 7
NC-500
560p
CMP
(7) (8)
comparator
RCLK
(16)
QUAL
(1)
RDATA
(2)
Differential
decoder
(9)
T2
9
8