HA12179F
Audio Signal Processer for Car Deck and Cassette Deck (Dolby B-type NR with PB Amp)
ADE-207-136 1st Edition Apr. 1994 Description
HA12179F is silicon monolithic bipolar IC providing Dolby noise reduction system*, line mute, music sensor and PB equalizer system in one chip.
Functions
• Line mute • PB equalizer • Dolby B-NR • Music sensor × 2 channel × 2 channel × 2 channel × 1 channel
Features
• Different type of PB equalizer characteristics selection (normal/chrome or metal) is avail.
Audio Signal Processer
HA12179F
Audio Signal Processer for Car Deck and Cassette Deck (Dolby B-type NR with PB Amp)
ADE-207-136 1st Edition Apr. 1994 Description
HA12179F is silicon monolithic bipolar IC providing Dolby noise reduction system*, line mute, music sensor and PB equalizer system in one chip.
Functions
• Line mute • PB equalizer • Dolby B-NR • Music sensor × 2 channel × 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. • Line mute ON/OFF is available. • Changeable to Foward, 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. • Pin compatible of HA12163 series except for 4 and 39 Pins. * Dolby is a trademark of Dolby Laboratories Licensing Corporation. A license from Dolby Laboratories Licensing Corporation is required for the use of this IC.
HA12179F
Ordering Information
Package HA12179F QFP 56 PB-OUT level 387.5 mVrms REC OUT level 300 mVrms Dolby level 300 mVrms
PB-OUT level above shown is typical value when adjusting Dolby level at Rec-out with NR-off mode.
Rev.1, Apr. 1994, page 2 of 40
LINE OUT (L) RECOUT (L) PB OUT (L) + 41 MUTE 27 M.