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參數(shù)資料
| 型號(hào)： | LM1897N |
| 英文描述： | Single Audio Preamp |
| 中文描述： | 單音頻前置放大器 |
| 文件頁數(shù)： | 1/10頁 |
| 文件大小： | 291K |
| 代理商： | LM1897N |
LM1894
Dynamic Noise Reduction System DNR
General Description
The LM1894 is a stereo noise reduction circuit for use with
audio
playback
systems.
The
DNR
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.
system
is
Features
n
Non-complementary noise reduction, “single ended”
n
Low cost external components, no critical matching
n
Compatible with all prerecorded tapes and FM
n
10 dB effective tape noise reduction CCIR/ARM
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
Typical Application
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.
DS007918-1
*R1 + R2 = 1 k
total.
See Application Hints.
Order Number LM1894M, LM1894N, or LM1894MT
See NS Package Number M14A, N14A, or MTC14
FIGURE 1. Component Hook-Up for Stereo DNR System
April 2002
L
2002 National Semiconductor Corporation
DS007918
www.national.com
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