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HA12204NT fiches techniques PDF

Hitachi Semiconductor - Audio Signal Processor for Cassette Deck(Dolby B-type NR with Recording System)

Numéro de référence HA12204NT
Description Audio Signal Processor for Cassette Deck(Dolby B-type NR with Recording System)
Fabricant Hitachi Semiconductor 
Logo Hitachi Semiconductor 





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HA12204NT fiche technique
HA12203NT/HA12204NT
Audio Signal Processor for Cassette Deck
(Dolby B-type NR with Recording System)
ADE-207-222B
Target Specification
3rd Edition
Jun. 1999
Description
HA12203NT is silicon monolithic bipolar IC providing Dolby noise reduction system*1, music sensor
system, REC equalizer system and each electronic control switch in one chip.
Note: 1. Dolby is a trademark of Dolby Laboratories Licensing Corporation. A license from Dolby
Laboratories Licensing Corporation is required for the use of this IC.
Functions
Dolby B - NR*2 × 2 channel
REC equalizer × 2 channel
Music sensor × 1 channel
Pass amp.
× 2 channel
Each electronic control switch to change REC equalizer, bias, etc.
Note: 2. HA12204NT is not built-in Dolby noise reduction system.
Features
REC equalizer is very small number of external parts and have 6 types of frequency characteristics
built-in.*3
2 types of input for PB, 1 type of input for REC.
70µ - PB equalizer changing system built-in.
Dolby NR with dubbing double cassette decks.
Unprocessed signal output available from recording out terminals during PB mode.
Provide stable music sensor system, available to design music sensing time and level.
Controllable from direct micro-computer output.
Bias oscillator control switch built-in.
NR ON / OFF and REC / PB fully electronic control switching built-in.
Normal-speed / high-speed, Normal / Crom / Metal*3 and PB equalizer fully electronic control
switching built-in.
Available to reduce substrate-area because of high integration and small external parts.

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