Digital-to-analog converter

Details Digital-to-analog converter Digital-to-analog converter

1986-11-06

1987-11-24

Sloyan, T. J.

Communications: electrical

Audible indication

Percussion-type sound producer

324 79R, 3281301, 340347NT, 340347M, 364569, H03M 182

Patent

active

047092246

ABSTRACT:
A digital-to-analog converter which develops an analog output representative of the difference between two digital inputs represented by the rates of two series of pulses. A prescribed number of pulses of each series is counted to develop two oppositely directed counter pulses, each having a duration dependent upon the time required to count the prescribed number of pulses. The counter pulses are integrated and the integration signal is sampled at the mid-point of each rise and decay. The average of the samples of each rise and decay represents the difference between the rates of the two series of input pulses.

REFERENCES:
patent: 4236110 (1980-11-01), Shearer et al.
patent: 4613950 (1986-09-01), Knierim

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