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Ordering No. B168-H7385-X-X-7600
Printed in Germany
PS 11983.
Block Diagram
RF Semiconductors in Car Radio AM/FM Receivers
1-Chip Car Radio IC TUA 4306
50
SNCHCC
49
48
47
AFout
46
45
44
43
42
V
Ref
H/S
AM/FM
C
to
Stereo Decoder
Noise Blanker
51
to
μ
C
Pilot Ind.
54
53
55
56
52
57
58
59
60
61
62
63
+
V
S
AM/FM
Fieldstr.
64
41
to
μ
C
Div C
to
40
39
38
37
36
35
RF AM
RF FM
34
33
32
1. Mixer
Prestage
AGC
Sel B
Sel A
31
29
30
+
V
S
+
V
S
28
27
26
10.7 MHz
24
23
FM IF
AMP
25
22
IF Converter
2. LO OSC
21
20
19
18
17
16
15
14
AM-AGC
Amplifier
+
V
S
13
12
FM-IF
Amplifier
10
11
9
8
7
6
5
4
3
2
1
MPD
Out
AGC
Time
to
μ
C
AM
Count
to
μ
C
450 kHz
10IN
10.7 MHz
IF Amp gain
FM
AM
AGC
Prestage
1. LO
456
kHz
Tuned
Input Filter
BB 914
Prestage
BF 1012 or
BF 1009 or
BF 998
Prestage
Tuned
Filter
BB 914
-FM-Tuner
-FM-IF
Demodulator
-Stereo Decoder
-Noise Blancer
-AM-UP/Down-
Converter
-FM/AM
-IC
TUA 4306
Oscillator Tank
Circuit
AM + FM
BA 885 or
BA 595
J-FET
+ BC 848C
AM
AGC
FM
AF
BB 914
AGC
Stereo
Decoder
Noise
Blanker
AM Up
Down Conv.
FM Tuner
FM IF
TUA 4306
PLL
SDA 4335
Audio
Processor
RDS Decoder
DARC/SWIFT
Audio
Power
Micro-
Controller
Availability
Samples available;
Product development release