Noise reduction circuit for a digital tone generator

Details Noise reduction circuit for a digital tone generator Noise reduction circuit for a digital tone generator

1976-10-18

1978-09-05

Schaefer, Robert K.

Music

Instruments

84 103, G10F 100

Patent

active

041110900

ABSTRACT:
A noise suppression circuit for digital tone generator in which a table of digitized data points are converted at a rate controlled by the fundamental frequency of the tone being generated. The suppression circuit determines the difference between each pair of successive data points and increments the prior data point in a succession of equal intermediate steps proportional to said difference. The data points together with the succession of incremented values between said data points are converted by a digital-to-analog converter at a converter rate equal to or greater than the maximum rate at which each data point is incremented.

REFERENCES:
patent: 3515792 (1970-06-01), Deutsch
patent: 3982460 (1976-09-01), Obayashi
patent: 4036096 (1977-07-01), Tomisawa

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