NAD C 730 Service Manual page 21

U902: LC72723M
Vdda
3
REFERENCE
VOLTAGE
Vssa
4
MPXIN
ANTIALIASING
2
FILTER
TEST
TEST
7
U903: LC7218
X IN 1
X OUT 24
FM IN 19
AM IN 18
CE 2
DI 3
CL 4
DO 5
V REF FLOUT CIN
1 5 6
V REF
57kHz
BPF
SMOOTHING
(SCF)
FILTER
CLK(4.332MHz)
OSC
9
X IN
REFERENCE
DIVIDER
1
SWALLOW COUNTER
2
12-BIT PROGRAMMABLE
SHIFT REGISTER
LATCH
9 10 11
OUT0 OUT1 OUT2
+
PLL
_
(57kHz)
8
X OUT
SYC
6
PHASE DETECTOR
CHARGE PUMP
1/16,1/17 4 BIT
DIVIDER
UNIVERSAL
COUNTER
12 13 14 17
OUT3 OUT4 OUT5 OUT6
23
CLOCK
RECOVERY
(1187.5Hz)
DATA
DECODER
RAM
(128bits)
RDS-ID
DETECT
21 PD1
22 PD2
16 HCTR
15 LCTR
3 V
DD
4 V
SS
7 8
IN0 IN1
Vddd
11
Vssd
10
RDDA
14
RDCL
15
MODE
12
RST
13
RDS-ID/READY
16