Description

HA12173 series are silicon monolithic bipolar IC providing Dolby noise reduction system*, music sensor and PB equalizer system in one chip.

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.

Functions

• PB equalizer × 2 channel

• Dolby B/C-NR × 2 channel

• Music sensor × 1 channel