Philips TDA1576T 1998 Nov 18 3, Fig.1 Block diagram.

1998 Nov 18 3 Philips Semiconductors Product specification
FM/IF amplifier/demodulator circuit TDA1576T
This text is here in white to force landscape pages to be rotated correctly when browsing through the pdf in the Acrobat reader.This text is here in
_white to force landscape pages to be rotated correctly when browsing through the pdf in the Acrobat reader.This text is here inThis text is here in
white to force landscape pages to be rotated correctly when browsing through the pdf in the Acrobat reader. white to force landscape pages to be ...
BLOCK DIAGRAM
Fig.1 Block diagram.
handbook, full pagewidth
MEH139
DETUNE
DETECTOR
0.5
mA
3.7 kΩ
8.3 kΩ
560 pF
33 pF
QL = 20
fo = 10.7 MHz
33 pF 6.8 nF
audio
outputs
10 Ω
0.1 µF 47 µF
3.7 kΩ
V2
MUTE
ATTENUATOR
QUADRATURE
DEMODULATOR
RES1IF1CPS VP
VP
V1 V2
RES2 IF2 VoAF1
VAF −VAF
VoAF2 n.c.
1098
Vi(det)
12
n.c.
11
Vo(det)
13
Vref
14
VF0
16
ViIF
17
VFB2 VFB1
0.1 µF0.1 µF
ViIF
RS
RS
18
GND
2 V (RMS)
20 19
VF
15
7654321
FMON
FM
on
REFERENCE
VOLTAGE
reference
voltage
detune
voltage
zero adjustment
of
field strength
indicator
field strength
LEVEL DETECTOR
4-STAGE
LIMITER/
AMPLIFIER
+4.9 V
+8.5 V
3.6 kΩ
25
kΩ
25
kΩ
1 nF 0.47 µF
1 mA
TDA1576T