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Philips Semiconductors
FM/IF amplifier/demodulator circuit
handbook, full pagewidth
Adjustment of the demodulator circuit is obtained with an IF signal which is higher than the 3 dB limiting level; L2 should be short-circuited or detuned;
L1 should be adjusted to minimum d
(1) Coil data: L1 = L2 = 0.38 H; Q
Fig.10 An example of the TDA1576T when using a demodulator with two tuned circuits.
1998 Nov 18
2
handbook, halfpage
V 3-7
V 3-7 (max)
1
0
0
Fig.9 Standby switch.
33 pF
3
4
560
TDA1576T
pF
6
7
33 pF
9
8
C 8-9
V oAF
distortion, and then L2 to minimum d
2
= 70; coil former KAN (C).
o
MEH148
V 5
1
2
V 5 (V)
39 pF
(1)
560
1 k
L1
pF
39 pF
distortion.
2
11
Product specification
TDA1576T
3
(1)
L2
390
MBK240
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