TDA3857 Datasheet, PDF (10/14 Pages) NXP Semiconductors – Quasi-split sound processor with two FM demodulators

Philips Semiconductors
Quasi-split sound processor with two FM demodulators
Product specification
TDA3857
(1) C_P = 47 pF with optional use of tracking
(because of C_o 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 C_P = 68 pF
C_S = C_P (f_VC/f_SC)² − C_P
C_S = 27 pF (see Fig.3)
Fig.4 Frequency response of the 38.9 MHz reference circuit.
June 1994
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