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 ViIF (pin 20) with ∆f=±22.5 kHz;fm= 1 kHz; de-emphasis 50 µs.
(1) Audio signal.
(2) Noise.
0
10−610−510−410−310−210−11
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 ViIF (pin20) with ∆f=±22.5kHz;fm= 1 kHz; de-emphasis 50 µs.
(1) Audio signal.
(2) Noise.
handbook, full pagewidth
20
V4
(dB)
−20
−40
−60
−80
0
MEH071
10−610−510−410−310−210−11
(1)
(2)
Vi20 (rms) (V)