HA12209F - Hitachi Semiconductor

HA12209F Audio Signal Processor

HA12209F is silicon monolithic bipolar IC providing Dolby noise reduction system*, music sensor system, REC equalizer system and each electronic control switch in one chip. Functions • Dolby B-NR • REC equalizer • Music sensor × 2 channel × 2 channel × 1 channel • Each electronic control switch to change REC equalizer, bias, etc. Features • REC equalizer .

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 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/.