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Description

HA12228F/HA12229F are silicon monolithic bipolar IC providing Dolby noise reduction system*, music sensor, PB equalizer system in one chip.

Features

? Different type of PB equalizer characteristics selection (120 ?s/70 ?s) is available with fully electronic control switching built-in.

? Easy interface with the PB head. (The PB-EQ resistance self-containing)

? Changeable to Forward, Reverse-mode for PB head with fully electronic control switching built-in.

? Available to change music sensing level by external resistor.

? Available to change response of music sensor by external capacitor.

? Music sensing level, built-in switch to change a band (MSGV).

? NR ON/OFF fully electronic control switching built-in. (Only HA12228F)

? Line mute control switching built-in.

? Available to connect direct with MPU.

? These ICs are strong for a cellular phone noise.

Functions

? PB equalizer ¡Á 2 channel

? Music sensor ¡Á 1 channel

? Dolby B-NR (Only HA12228F) ¡Á 2 channel

? Line mute SW ¡Á 2 channel