M-DNR LM1894 Noise Reduction Module. NS Dynamic Noise Reduction PCB For Audio use
Description
M-DNR LM1894
National Semiconductor Dynamic Noise Reduction IC Module
For use with Pre Amplifiers,Tape Recorders, Tuners, ETC.
For normal use you don’t need the Subcarrier 19Khz FM Version
With DNR Control Switch (the switch not included)
Noise Threshold Calibration Trimmer
Optional: LED Display to connect with LM1894 Pin 10
Max Input Signal: 1 Vrms (Input Overload)
Working Voltage : 9-18Vdc (Recommended 15Vdc)
PCB Size: 47mmx37mm FR4 PCB
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.