TDA8742 Datasheet, PDF (16/21 Pages) NXP Semiconductors – Satellite sound circuit with noise reduction

Philips Semiconductors
Satellite sound circuit with noise reduction
APPLICATION INFORMATION
General
This application is mainly intended to have more than two
inputs for secondary channel available. In this event a
choice between the same frequency sets e.g. 10.7 and
10.52 MHz but with different bandwidths is possible. A
narrow bandwidth can be chosen in the event of a weak
signal, however this produces slightly more distortion. A
normal signal will be processed using 150 kHz filters thus
resulting in a signal with normal distortion. For the main
channel either baseband or synthesized signal can be
selected. The circuit is illustrated in Fig.5.
Product specification
TDA8742; TDA8742H
October 1994
16