TDA1072AT datasheet(13/21 Pages) PHILIPS

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TDA1072AT Datasheet(PDF) 13 Page - NXP Semiconductors

13 / 21 page

March 1989

Philips Semiconductors

Product speciﬁcation

AM receiver circuit

TDA1072AT

Fig.10 Suppression of cross-modulation as a function of input signal, measured in the circuit of Fig.8 with the

input circuit as shown in Fig.11. Curve is for wanted VO(AF)/unwanted VO(AF) = 20 dB; Vrfw, Vrfu are signals

at the aerial input, V'aew, V'aeu are signals at the unloaded output of the aerial.

Wanted signal (V'aew, Vrfw): fi = 1 MHz; fm = 400 Hz; m = 30%.

Unwanted signal (V'aeu, Vrfu): fi = 900 kHz; fm = 400 Hz; m = 30%.

Effective selectivity of input tuned circuit = 21 dB.

Fig.11 Input circuit to show cross-modulation suppression (see Fig.10).

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