Description
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.
REC equalizer
Dolby B/C NR
Electronic volume
Level Meter × 2 channel × 2 channel × 2 channel × 2 channel
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 selection SW and REC/PB SW.
- Dolby noise reduction with dubbing cassette decks (Unprocessed signal output available from recording out terminals during PB mode).
- Log-compressed level mete.
HA12155NT_HitachiSemiconductor.pdf
