HA12155NT Datasheet (Hitachi Semiconductor)

HA12155NT, Audio Signal Processor

HA12155NT/HA12157NT is silicon monolithic bipolar IC providing Dolby noise reduction system *, electrical volume system, REC equalizer system and level meter system in one chip.

Functions * REC equalizer * Dolby B/C NR * Electronic volume * Level Meter × 2 channel

HA12155NT Features

* Inductor less REC equalizer is adjustable of its characteristics by external resistor

* Rec level is adjustable automatically with electrical volume which is built-in

* 3 type of input selection is available (one is by way of electrical volume)

* Separate input sele