TDA4445A - ST Microelectronics

TDA4445A SOUND IF AMPLIFIER

TDA4445A : Sound IF amplifier, with FM processing for quasi parallel sound system. TDA4445B : Sound IF amplifier, with FM processing and AM demodulator, for multi-standard sound TV appliances. TDA4445B additionnal : Bistandard applications (B/G and L) No adjustment of the AM demodulator Low AM distortion PIN CONNECTIONS DIP16 (Plastic Package) ORDER CODE : .

Features

NNECTED GROUND FM MODULATED SOUND OUTPUT SUPPLY VOLTAGE NOT TO BE CONNECTED REFERENCE L.C. NETWORK 4445-01.EPS NOT TO BE CONNECTED REFERENCE L.C. NETWORK December 1992 1/6 TDA4445A - TDA4445B BLOCK DIAGRAMS TDA4445A TDA4445B GENERAL DESCRIPTION Quasi parallel sound operation : High phase accuracy of the carrier signal proc2/6 . . . . This circuit includes the following functions : Three symmetrical and gain controlled wide band amplifier stages, which are extremely stable by quasi DC coupling without feedback. Averaging AGC with discharge control circuit AGC voltage generator AM-Demo.