FEATURES
D D D D D D Very high input sensitivity Excellent signal to noise ratio Fast averaged AGC IF amplifier can be switched off for VTR mode Output signal stabilized against VS variations Very few external components TDA4445B additional D Targeting bistandard applications (B/G and L) D Alignment free AM demodulator D Low AM distortion Case: DIP16 Figure 1. Block diagram TDA4445A Figure 2. Block diagram TDA4445B Rev. A1: 14.09.1995 1 (8) TDA4445A/TDA4445B Pin DESCRIPTION
Pin 1–16 3 8–9 11 12 13 2, 4, 7, 10, 14, 15 Symbol Function IF input If AGC time constant Tuned circuit Supply voltage Sound-IF-output Ground not connected TELEFUNKEN Semiconductors Circuit DESCRIPTION
This circuit includes the following functions D Three symmetrical and gain controlled wide band amplifier stages, which are extremely stable by quasi DC coupling without feedback D Averaged AGC with discharge control circuit D AGC voltage generator Quasi parallel sound operation D High phase accuracy of the carrier si...
TEMIC Semiconductors
