JVC KD-LX111R Service Manual page 16

BU1923F (IC51) : RDS decoder
1. Pin layout
1
QUAL
16 RCLK
2
RDATA 15 N.C.
3
Vref
14 XO
4
MUX 13 XI
5
VDD1
12 VDD2
6
VSS1 11
VSS2
7
VSS3
10 T1
8
CMP
9 T2
2. Block diagram
100k
MUX
4
120k
100k
Vref
3
VDD1
5
Analog
Power supply
VSS1
6
VDD2
12
Digital
Power supply
VSS2
11
13
Xl
RPM6938-V4 (IC603) : Remocon reseiver
1. Block diagram
I/V
conversion
PD
magnetic shield
-
+
anti-aliasing
filter
PLL
PLL
57kHz
1187.5Hz
RDS/ARI
Reference
clock
14
X0
AGC
AMP
BPF
for
trimming
circuit
VSS3
CMP
7 8
8th Switched
capacitor filter
comparator
Differential
Bi-phase
decoder
decoder
Measurement
circuit
10 9
T2
T1
Vcc
Comp
Detector
RCLK
16
1 QUAL
RDATA
2
Vcc
22k
ROUT
GND
KD-LX111R
1-31