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LM1894 - Dynamic Noise Reduction System DNR

This page provides the datasheet information for the LM1894, a member of the LM1 Dynamic Noise Reduction System DNR family.

Datasheet Summary

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

  • n Non-complementary noise reduction, “single ended” n Low cost external components, no critical matching Typical.

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Datasheet preview – LM1894

Datasheet Details

Part number LM1894
Manufacturer National Semiconductor
File Size 270.24 KB
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 Dynamic Noise Reduction System DNR December 1994 LM1894 Dynamic Noise Reduction System DNR ® General 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. DNR can save circuit board space and cost because of the few additional components required. n Compatible with all prerecorded tapes and FM n 10 dB effective tape noise reduction CCIR/ARM weighted n Wide supply range, 4.
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