HA12204NT中文資料日立數(shù)據(jù)手冊PDF規(guī)格書

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.

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.

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.