HA12228F Overview
HA12228F/HA12229F are silicon monolithic bipolar IC providing Dolby noise reduction system , music sensor, PB equalizer system in one chip. Dolby is a trademark of Dolby Laboratories Licensing Corporation. A license from Dolby Laboratories Licensing Corporation is required for the use of this IC.
HA12228F Key Features
- Easy interface with the PB head. (The PB-EQ resistance self-containing)
- 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)
- Available to connect direct with MPU
- These ICs are strong for a cellular phone noise
- Time constant pin for 1 MS rectifier
- Equalizer output
- Equalizer input (FORWARD)