LM1894
www.ti.com SNAS551C – DECEMBER 1994 – REVISED APRIL 2013 LM1894 Dynamic Noise Reduction System DNR
Check for Samples: LM1894 FEATURES 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. 1 2 Non-Complementary Noise Reduction, “Single
Ended”
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, 4.5V to 18V
1 Vrms Input Overload APPLICATIONS Automotive Radio/Tape Players
Compact Portable Tape Players
Quality HI-FI Tape Systems …