HA12226F Datasheet, PDF (1/84 Pages) Hitachi Semiconductor – Audio Signal Processor for Cassette Deck(Dolby B-type NR with Recording System)

HA12226F/HA12227F
Audio Signal Processor for Cassette Deck
(Dolby B-type NR with Recording System)
REJ03F0133-0600
Previous: ADE-207-270E
Rev.6.00
Jun 15, 2005
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.
Rev.6.00 Jun 15, 2005 page 1 of 83