Philips Semiconductors
Product specification
FM radio circuit
TDA7000
Fig.3 A.F output voltage (V ) and total harmonic distortion (THD) as a function of the e.m.f. input voltage (EMF)
o
with a source impedance (R ) of 75 Ω: (1) muting system enabled; (2) muting system disabled.
S
Conditions:
0 dB = 75 mV; f = 96 MHz.
rf
for S + N curve: ∆f = ± 22,5 kHz; f = 1 kHz.
m
for THD curve; ∆f = ± 75 kHz; f = 1 kHz.
m
Notes
1. The muting system can be disabled by feeding a current of about 20 µA into pin 1.
2. The interstation noise level can be decreased by choosing a low-value capacitor at pin 3. Silent tuning can be
achieved by omitting this capacitor.
May 1992
6
NXP [ NXP ]
