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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
V
i20 (rms)
(V)
V
4
(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
V
4
(dB)
−20
−40
−60
−80
0
MEH073
10
−6
10
−5
10
−4
10
−3
10
−2
10
−1
1
(1)
(2)
V
i20 (rms)
(V)