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supply
reference
voltage
0.1 µF
not connected
noise
averaging
modulus output
8
audio output
ground
20
11
10
ADDER
13
9
1
4
3.6 V
20
kΩ
MEMORY
LOAD
V
audio input
U
HIGH - PASS
FILTER
STABILIZER
OFFSET
12
kΩ
V
V
1.5
kΩ
ref
I
3
R1
V
(min)
0.47
µF
VOLTAGE
REFERENCE
ADDER
ADDER
offset
voltage
COMPARATOR
LOW - PASS
FILTER
delay soft mute
MUTE
7
33
nF
ADDER
19
18
17
16
to
4 - STAGE
JOHNSON
COUNTER
level input direct
5
antenna
switch
&
level input
via
capacitor
3.3
kΩ
6
MONOSTABLE
MULTIVIBRATOR
ADDER
&
&
&
1
µF
1
3.3
nF
20
kΩ
offset
complete
stop
reset
offset
voltage
ADDER
MODE SELECT
TIMING
100 Ω
VOLTAGE
REFERENCE
R3
TEA6101T
&
kΩ
1.5 kΩ
33
reset
R2
14
12
15
2
MBA543 - 1
level
averaging
memory
timing
1 µF
47 nF
test pin
control
Fig.1 Block diagram.
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