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LM1894 - Dynamic Noise Reduction System DNR

Description

The LM1894 is a stereo noise reduction circuit for use with audio playback systems.

The DNR system is non-complementary, meaning it does not require encoded source material.

The system is compatible with virtually all prerecorded tapes and FM broadcasts.

Features

  • 1.
  • 2 Non-Complementary Noise Reduction, “Single Ended”.
  • Low Cost External Components, No Critical Matching.
  • Compatible with All Prerecorded Tapes and FM.
  • 10 dB Effective Tape Noise Reduction CCIR/ARM Weighted.
  • Wide Supply Range, 4.5V to 18V.
  • 1 Vrms Input Overload.

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Datasheet preview – LM1894

Datasheet Details

Part number LM1894
Manufacturer Texas Instruments
File Size 1.02 MB
Description Dynamic Noise Reduction System DNR
Datasheet download datasheet LM1894 Datasheet
Additional preview pages of the LM1894 datasheet.

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Full PDF Text Transcription

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LM1894 www.ti.com SNAS551C – DECEMBER 1994 – REVISED APRIL 2013 LM1894 Dynamic Noise Reduction System DNR Check for Samples: LM1894 FEATURES 1 •2 Non-Complementary Noise Reduction, “Single Ended” • Low Cost External Components, No Critical Matching • Compatible with All Prerecorded Tapes and FM • 10 dB Effective Tape Noise Reduction CCIR/ARM Weighted • Wide Supply Range, 4.5V to 18V • 1 Vrms Input Overload DESCRIPTION The LM1894 is a stereo noise reduction circuit for use with audio playback systems. The DNR system is non-complementary, meaning it does not require encoded source material. The system is compatible with virtually all prerecorded tapes and FM broadcasts. Psychoacoustic masking, and an adaptive bandwidth scheme allow the DNR to achieve 10 dB of noise reduction.
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