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

Numéro de référence HA12227F
Description Audio Signal Processor for Cassette Deck(Dolby B-type NR with Recording System)
Fabricant Hitachi Semiconductor 
Logo Hitachi Semiconductor 





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HA12227F fiche technique
HA12226F/HA12227F
Audio Signal Processor for Cassette Deck
(Dolby B-type NR with Recording System)
ADE-207-270E (Z)
6th Edition
Dec. 2000
Description
The HA12226F/HA12227F are 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.
The HA12227F is not built-in Dolby B-NR.
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. The HA12227F is not built-in Dolby B-NR.
Features
REC equalizer is very small number of external parts and have 4 types of frequency characteristics
built-in.
2 types of input for PB, 1 type of input for REC.
70µ - PB equalizer changing system built-in.
Dolby NR*2 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 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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