Description

HA12141/142NT, HA12170NT, HA12161/162FP are silicon monolithic bipolar IC series providing dual channel Dolby B- and C-type noise reduction* in one chip.

Features

• Low external parts count

• R-C spectrum skewing network using passive component

• External capacitors are E-3 series (small values)

• Several time constant capacitors built into the IC

• Separate REC/PB input and output. Unprocessed signal output available in the encode and decode modes.

• Common PCB pattern is available with HA12134A series (Dolby B NR), because these ICs offer similar pin layout.

• 3 type PB-out level (300 mV, 580 mV, 775 mV)

• 2 type package (DP-30S, FP-28D)

• Wide range of operating supply voltage (7.5 V to 16 V)

Functions

• Dual Dolby B/C-type NR processor

• NR OFF/B/C control switch

• MPX by-pass / Encode / Decode (MPX OFF / REC / PB) control switch

• MPX Filter Drive Circuit