Hitachi HA12177
the HA12163 series (Dolby B - type).DESCRIPTION
HA12173 series are silicon monolithic bipolar IC providing Dolby noise reduction system*, music sensor and PB equalizer system in one chip. Functions● PB equalizer
● Dolby B/C-NR
● Music sensor × 2 channel × 2 channel × 1 channel
FEATURES
● Different type of PB equalizer characteristics selection (normal/chrome or metal) is available with fully electronic control switching built-in.● 2 type of input selection (RADIO/TAPE) is available.
● Changeable to Forward, Reverse-mode for PB head with fully electronic control switching built-in.
● Available to change music sensing level by external resistor.
● Music sensing level selection is available with fully electronic control switching built-in.
● Available to change frequency response of music sensor.
● NR-ON/OFF and REC/PB fully electronic control switching built-in.
● 4 type of PB-out level.
● Available to allow common PCB designs with HA12163 series. * Dolby is a trademark of Dolby Laboratories Licensing Corporation. A license from Dolby Laboratories Licensing Corporation is required for the use of this IC.