TDA3857 datasheet(10/14 Pages) PHILIPS

Part #	TDA3857

Description	Quasi-split sound processor with two FM demodulators

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Manufacturer	PHILIPS [NXP Semiconductors]

Direct Link	http://www.nxp.com

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10 / 14 page

June 1994

10

Philips Semiconductors

Product speciﬁcation

Quasi-split sound processor with two FM demodulators

TDA3857

Fig.3 Test and application circuit for standard B/G (for application SAW-filters must be used).

(1) CP = 47 pF with optional use of tracking

(because of Co of the varicaps).

Fig.4 Frequency response of the 38.9 MHz reference circuit.

(1) simple resonant circuit

(2) resonant circuit with CP =68pF

CS =CP (fVC/fSC)2 − CP

CS = 27 pF (see Fig.3)

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