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TDA1572T

AM receiver

Philips Electronics 

Philips Semiconductors

AM receiver

Product specification

TDA1572T

SYMBOL

PARAMETER

MIN.

TYP.

MAX.

UNIT

Unwanted signals

Suppression of IF whistles at

Vi = 15 µV; m = 0% related to AF signal

of m = 30%

α2IF

at fi ≈ 2 × fIF

α3IF

at fi ≈ 3 × fIF

IF suppression at RF input;

−

37

−

dB

−

44

−

dB

αIF

for symmetrical input

αIF

for asymmetrical input

Residual oscillator signal at mixer output;

−

40

−

dB

−

40

−

dB

I1(osc)

I1(2osc)

at fosc

at 2 × fosc

−

1

−

µA

−

1.1

−

µA

Note

1. AF signals at the IF output will be suppressed by a coupling capacitor to the demodulator and by full wave-detection

in the demodulator.

Fig.3 AF output as a function of RF input in the

circuit of Fig.1; fi = 1 MHz; fm = 400 Hz;

m = 30%.

Fig.4

Total harmonic distortion and (S + N)/N as

functions of RF input in the circuit of Fig.1;

m = 30% for (S + N)/N curve and m = 80%

for THD curve.

May 1992

11

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