Philips Semiconductors
IF amplifier/demodulator for
FM car radio receivers
Product specification
TDA1593
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 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.
0
V4
(dB)
−20
(1)
−40
(2)
−60
MBE520
−80
−100
10−6
(1) Audio signal.
(2) Spurious AM signal.
10−5
10−4
10−3
10−2
10−1 Vi20 (rms) (V) 1
Fig.6 Typical AM suppression as a function of the input signal ViIF (pin 20) with ∆f = ±22.5 kHz; fm = 1 kHz;
AM with fm = 400 Hz; m = 0.3 and 250 to 15000 Hz bandwidth.
1996 Oct 10
11