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LM1894M bảng dữ liệu(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
tên linh kiện LM1894M
Giải thích chi tiết về linh kiện  Dynamic Noise Reduction System DNR
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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 compo-
nents required.
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 = 1k
Ω 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
December 1994
© 1999 National Semiconductor Corporation
DS007918
www.national.com


Số phần tương tự - LM1894M

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