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SOT146

Quasi-split sound processor with two FM demodulators

Philips Electronics 

Philips Semiconductors

Quasi-split sound processor with two FM demodulators

Product specification

TDA3857

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

(because of Co of the varicaps).

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

(1) simple resonant circuit

(2) resonant circuit with CP = 68 pF

CS = CP (fVC/fSC)2 − CP

CS = 27 pF (see Fig.3)

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

June 1994

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