Digital-to-analog converting system

Details Digital-to-analog converting system Digital-to-analog converting system

1986-10-10

1988-04-19

Sloyan, T. J.

Communications: electrical

Audible indication

Percussion-type sound producer

340347CC, 340347M, H03M 168, H03M 182

Patent

active

047393041

ABSTRACT:
A digital-to-analog convertor divides an input digital signal into a least significant bit group and a most significant bit group. The most significant bit group is converted using pulse amplitude modulation and the least significant bit group is converted using pulse width modulation, in which the pulse widths are varied symmetrically about predetermined time points within a conversion period in order to improve the linearity of the pulse width modulation conversion.

REFERENCES:
patent: 3754233 (1973-08-01), Sutherland
patent: 3893102 (1975-07-01), Candy
patent: 4369432 (1983-01-01), Mikami
patent: 4536743 (1985-08-01), Uchikoshi
patent: 4542371 (1985-09-01), Uchikoshi
patent: 4567468 (1986-01-01), Tanaka
Schmid, Electronic Analog/Digital Conversions, Van Nostrand Reinhold Company, 1970, pp. 168-175; 206-213.

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