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I
25
R1
gain
AGND
26
22 µF
22 nF
V
27
CCA
V
CCA
4.7 Ω
I/Q-MIXER
FM antenna
1st FM
100 pF
28
RFI1
27 pF
RFGND
29
L1
30
47 pF
RFI2
TAGC
31
4.7 nF
32
LOOPSW
1
CPOUT
10 nF
39 nF
10 kΩ
100 kΩ
The component list is given Chapter 14.
(1) C
and C
data depends on crystal specification.
comp
pull
47 nF
LIMDEC2
24
GAIN
STABILIZATION
RESONANCE
LIMITER
AMPLIFIER
LEVEL
÷2
ADC
N1
IF CENTRE
FREQUENCY
ADJUST
AGC
programmable divider output
TUNING SYSTEM
reference frequency divider output
VCO
2
3
4
5
VCOTANK1
VCOTANK2
V
DGND
CC(VCO)
V
CCD
D1
D2
L3
L2
22 nF
47 Ω
V
CC(VCO)
Fig.1 Block diagram.
47 nF
47 nF
33 nF
33 nF
V
LIMDEC1
TIFC
ref
MPXO
TMUTE
23
22
21
20
19
POWER
SUPPLY
DEMODULATOR
SOFT
MUTE
SDS
IF
COUNTER
MPX
DECODER
I
ref
TEA5768HL
OSCILLATOR
SOFTWARE
PROGRAMMABLE
MUX
PORT
pilot
mono
2
I
C-BUS
6
7
8
V
DATA
CLOCK
CCD
12 Ω
22 nF
V
V
AFR
AFL
18
17
1 nF
16
PILFIL
22 nF
33 kΩ
22 nF
15
PHASEFIL
(1)
C
comp
14
XTAL2
(1)
CRYSTAL
C
32.768 kHz
pull
XTAL1
13
or
13 MHz
10 kΩ
12
SWPORT2
11
SWPORT1
V
CCA
10 kΩ
10 BUSENABLE
BUSMODE
9
mhc275
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