Hitachi HA12228F
HA12229F is not built-in Dolby B-NR.DESCRIPTION
HA12228F/HA12229F are silicon monolithic bipolar IC providing Dolby noise reduction system*, music sensor, PB equalizer system in one chip. Notes: 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. 2. HA12229F is not built-in Dolby B-NR. Functions● PB equalizer
● Music sensor
● Dolby B-NR (Only HA12228F)
● Line mute SW × 2 channel × 1 channel × 2 channel × 2 channel
FEATURES
● Different type of PB equalizer characteristics selection (120 µs/70 µs) 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).