12136AF Datasheet (Hitachi Semiconductor) - Dolby B-Type Noise Reduction System

12136AF, Dolby B-Type Noise Reduction System

The HA12134A, HA12135A, HA12136A are silicon monolithic bipolar IC series providing dual channel Dolby B-type noise reduction system * in one chip.

The circuit is used primarily to reduce the level of background noise introduced during recording and playback of audio signals on magnetic tape.

HA1

12136AF Features

* Functions

* Dual Dolby B-type NR processor

* NR ON/OFF control switch.

* Record (encode)/playback (decode) control switch. Features

* Separate record/playback input and output. Unprocessed signal output available in the encode and decode modes.

* Reduction