LM1894

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SNAS551C – DECEMBER 1994 – REVISED APRIL 2013

LM1894 Dynamic Noise Reduction System DNR

Check for Samples: LM1894

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FEATURES

DESCRIPTION

The LM1894 is a stereo noise reduction circuit for use

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•

Non-Complementary Noise Reduction, “Single

with audio playback systems. The DNR system is

Ended”

non-complementary, meaning it does not require

•

Low Cost External Components, No Critical

encoded source material. The system is compatible

Matching

with

virtually

all

prerecorded

tapes

and

FM

broadcasts.

Psychoacoustic

masking,

and

an

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Compatible with All Prerecorded Tapes and

adaptive bandwidth scheme allow the DNR to

FM

achieve 10 dB of noise reduction. DNR can save

•

10 dB Effective Tape Noise Reduction

circuit board space and cost because of the few

CCIR/ARM Weighted

additional components required.

•

Wide Supply Range, 4.5V to 18V

•

1 Vrms Input Overload

APPLICATIONS

•

Automotive Radio/Tape Players

•

Compact Portable Tape Players

•

Quality HI-FI Tape Systems

•

VCR Playback Noise Reduction

•

Video Disc Playback Noise Reduction

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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

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PRODUCTION DATA information is current as of publication date.

Copyright © 1994–2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.