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LM832N Datasheet

  • LM832N

  • LM832 Dynamic Noise Reduction System DNR

  • 11頁

  • NSC

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LM832 Dynamic Noise Reduction System DNR
August 1989
LM832 Dynamic Noise Reduction System DNR
General Description
The LM832 is a stereo noise reduction circuit for use with
audio playback systems The DNR system is noncomple-
mentary meaning it does not require encoded source mate-
rial 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 re-
quired
The LM832 is optimized for low voltage operation with input
levels around 30 mVrms
For higher input levels use the LM1894
Features
Y
Y
Y
Y
Y
Y
Y
Y
Y
Low voltage battery operation
Non-complementary noise reduction 鈥樷€榮ingle ended鈥欌€?/div>
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 1 5V to 9V
150 mVrms input overload
No royalty requirements
Cascade connection for 17 dB noise reduction
Applications
Y
Y
Y
Y
DNR is a registered trademark of National Semiconductor Corporation
The DNR system is licensed to National Semiconductor Corp under U S patent 3 678 416
and 3 753 159
A trademark and licensing agreement is required for the use of this product
Headphone stereo
Microcassette players
Radio cassette players
Automotive radio tape players
Application Circuit
Order Number LM832M See NS Package M14A
Order Number LM832N See NS Package N14A
FIGURE 1 Component Hook-up for Stereo DNR System
TL H 5176 鈥?1
C
1995 National Semiconductor Corporation
TL H 5176
RRD-B30M115 Printed in U S A

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