LM1894

更新时间： 2024-11-25 22:51:55

品牌	Logo	应用领域
美国国家半导体 - NSC		/
页数	文件大小	规格书
10页	273K
描述
Dynamic Noise Reduction System DNR

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数据手册

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LM1894 数据手册

December 1994

LM1894

Dynamic Noise Reduction System DNR^®

n Compatible with all prerecorded tapes and FM

n 10 dB effective tape noise reduction CCIR/ARM

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 compo-

nents required.

weighted

n Wide supply range, 4.5V to 18V

n 1 Vrms input overload

Applications

n Automotive radio/tape players

n Compact portable tape players

n Quality HI-FI tape systems

n VCR playback noise reduction

n Video disc playback noise reduction

Features

n Non-complementary noise reduction, “single ended”

n Low cost external components, no critical matching

Typical Application

DS007918-1

*R1 + R2 1 kΩ total.

See Application Hints.

Order Number LM1894M or LM1894N

See NS Package Number M14A or N14A

FIGURE 1. Component Hook-Up for Stereo DNR System

DNR^®is a registered trademark of National Semiconductor Corporation.

The DNR^®system is licensed to National Semiconductor Corporation under U.S. patent 3,678,416 and 3,753,159.

Trademark and license agreement required for use of this product.

DS007918

www.national.com

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与LM1894相关器件

型号	品牌	获取价格	描述	数据表
LM1894M	NSC	获取价格	Dynamic Noise Reduction System DNR
LM1894M/NOPB	TI	获取价格	IC SPECIALTY CONSUMER CIRCUIT, PDSO14, LEAD FREE, SOP-14, Consumer IC:Other
LM1894MDC	NSC	获取价格	IC SPECIALTY CONSUMER CIRCUIT, UUC, DIE, Consumer IC:Other
LM1894MT	ETC	获取价格
LM1894MT/NOPB	TI	获取价格	SPECIALTY CONSUMER CIRCUIT, PDSO14, TSSOP-14
LM1894MTX/NOPB	TI	获取价格	SPECIALTY CONSUMER CIRCUIT, PDSO14, TSSOP-14
LM1894MWC	NSC	获取价格	IC SPECIALTY CONSUMER CIRCUIT, UUC, WAFER, Consumer IC:Other
LM1894MX	TI	获取价格	IC SPECIALTY CONSUMER CIRCUIT, PDSO14, SOP-14, Consumer IC:Other
LM1894MX/NOPB	TI	获取价格	立体动态降噪系统 \| D \| 14 \| 0 to 70
LM1894N	NSC	获取价格	Dynamic Noise Reduction System DNR