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