1997 Feb 27
12
Philips Semiconductors
Product specification
IF amplifier/demodulator for FM radio receivers
TDA1597
0
10
−
6
10
−
5
10
−
4
10
−
3
10
−
2
10
−
1
1
MBE520
−
20
−
40
−
60
−
80
−
100
Vi20 (rms) (V)
V4
(dB)
(1)
(2)
Fig.7
FM-MUTE-ON: Typical AM suppression as a function of the input signal V
iIF
(pin 20) with
∆
f =
±
22.5 kHz;
f
m
= 1 kHz; AM with f
m
= 400 Hz; m = 0.3 and 250 to 15000 Hz bandwidth.
(1) Audio signal.
(2) Spurious AM signal.
Fig.8
FM-MUTE-OFF: Typical AM suppression as a function of the input signal V
iIF
(pin 20) with
∆
f =
±
22.5 kHz;
f
m
= 1 kHz; AM with f
m
= 400 Hz; m = 0.3 and 250 to 15000 Hz bandwidth.
(1) Audio signal.
(2) Spurious AM signal.
handbook, full pagewidth
20
V4
(dB)
−
20
−
40
−
60
−
80
0
MEH073
10
−
6
10
−
5
10
−
4
10
−
3
10
−
2
10
−
1
1
(1)
(2)
Vi20 (rms) (V)
