TDA8050 Ver la hoja de datos (PDF) - Philips Electronics

Número de pieza

componentes Descripción

Fabricante

TDA8050

QPSK transmitter

Philips Electronics 

Philips Semiconductors

QPSK transmitter

handbook, full pagewidth

500 kHz

50 Ω

50 Ω

300 kHz

Product specification

TDA8050

I_IN

I_INC

RF_OUT

RF_OUTC

Q_IN

Q_INC

39.1 39.5 39.7 39.9

40

40.1 40.3 40.5 40.7

f (MHz)

FCE184

3rd-order intermodulation distortion;

Two tones of 260 mV (p-p) at each I and Q input:

V(av) = 4----02---0-- × 102-–---40--= 128 mV (RMS)

2 sine waves with a total RMS values of 128 mV give:

2 × x2 = 128

x = 1----2---8-- = 90 mV (RMS) = 260 mV (p-p) and f1 = 300 kHz,

2

f2 = 500 kHz and fRF = 40 MHz.

Fig.4 3rd-order intermodulation distortion in I and Q channels (IM3).

1999 Dec 14

10

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