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TDA1576T Просмотр технического описания (PDF) - Philips Electronics
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TDA1576T
FM-IF amplifier/demodulator circuit
Philips Electronics
TDA1576T Datasheet PDF : 16 Pages
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handbook, full pagewidth
2 V (RMS)
RS
ViIF RS
0.1
µ
F
GND
VFB1
20 19
0.1
µ
F
VFB2
18
zero adjustment
of
field strength
indicator
ViIF
VF0
17
16
1 mA
field strength
detune
voltage
3.6 k
Ω
1 nF
reference
voltage
+
4.9 V
0.47
µ
F
VF
Vref
Vo(det)
15
14
13
Vi(det) n.c.
12
11
25
k
Ω
25
k
Ω
4-STAGE
LIMITER/
AMPLIFIER
TDA1576T
V1
V2
8.3 k
Ω
1
VP
10
Ω
+
8.5 V
VP
0.1
µ
F
2
CPS
47
µ
F
3
IF1
33 pF
560 pF
LEVEL DETECTOR
REFERENCE
VOLTAGE
MUTE
ATTENUATOR
0.5
DETUNE
mA DETECTOR
QUADRATURE
DEMODULATOR
V2
3.7 k
Ω
3.7 k
Ω
4
5
6
7
RES1 FMON RES2 IF2
FM
on
33 pF
8
VoAF1
9
VoAF2
6.8 nF
QL = 20
fo = 10.7 MHz
audio
VAF
outputs
−
VAF
10
n.c.
MEH139
Fig.1 Block diagram.
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