National Semiconductor NR-2 Adaptive Noise Processor
Application note from 1978 showing the LM13600 being used as an adaptive noise reduction system using a sliding voltage-controlled filter.
National Semiconductor NR-2 Adaptive Single-Ended Noise Reduction Block Diagram
National Semiconductor NR-2 Adaptive Noise Processor.
Full pdf: https://proaudiodesignforum.com/images/ ... cessor.pdf (7 MB)
Thanks to JR for sending this to me.
National Semiconductor NR-2 Adaptive Noise Processor
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