HA12215F

HA12215F Audio Signal Processor for Cassette Deck (Dolby B-type NR with Recording System) ADE-207-253D (Z) Target Specification 5th Edition Oct. 1999 Description HA12215F is silicon monolithic bipolar IC providing Dolby noise reduction system* , 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. 1 Functions Dolby B-NR Music sensor Pass amp. × 2 channel × 1 channel × 2 channel REC equalizer × 2 channel Each electronic control switch to change REC equalizer, bias, etc. Features REC equalizer is very small number of external parts and have 6 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 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 and PB equalizer fully electronic control switching built-in. Available to reduce substrate-area because of high integration and small external parts. HA1...