1997 Feb 27
11
Philips Semiconductors
Product specification
IF amplifier/demodulator for FM radio receivers
TDA1597
Fig.5
FM-MUTE-ON: Audio signal and noise as functions of the input signal V
iIF
(pin 20) with
∆
f =
±
22.5 kHz;
f
m
= 1 kHz; de-emphasis 50
µ
s.
(1) Audio signal.
(2) Noise.
0
10
−
6
10
−
5
10
−
4
10
−
3
10
−
2
10
−
1
1
MBE519
−
20
−
40
−
60
−
80
−
100
Vi20 (rms) (V)
V4
(dB)
(1)
(2)
Fig.6
FM-MUTE-OFF: Audio signal and noise as functions of the input signal V
iIF
(pin 20) with
∆
f =
±
22.5 kHz;
f
m
= 1 kHz; de-emphasis 50
µ
s.
(1) Audio signal.
(2) Noise.
handbook, full pagewidth
20
V4
(dB)
−
20
−
40
−
60
−
80
0
MEH071
10
−
6
10
−
5
10
−
4
10
−
3
10
−
2
10
−
1
1
(1)
(2)
Vi20 (rms) (V)