TDA3858 Datasheet (NXP) - Quasi-split sound processor

TDA3858, Quasi-split sound processor

TDA3858 Separate symmetrical IF inputs for FM or AM sound.

Gain controlled wideband IF amplifier, input select switch.

AGC generation due to peak sync for FM or mean signal level for AM.

Reference amplifier for the regeneration of the vision carrier.

Optimized limiting amplifier for AM suppression

TDA3858 Features

* Quasi-split sound processor for all standards e. g. B/G (FM sound) and L (AM sound)

* Reducing of spurious video signals by tracking function and AFC for the vision carrier reference circuit; (recommended for NICAM)

* Automatic muting of the AF2 signal (at B/G) by the input