Variable digital to analog converter

Details Variable digital to analog converter Variable digital to analog converter

1979-07-19

1980-12-16

Miller, Charles D.

Communications: electrical

Audible indication

Percussion-type sound producer

H03K 1302

Patent

active

042400708

ABSTRACT:
The apparatus and method provides for an improvement to a system which converts wide amplitude range digital data recorded in floating point digital word form to analog signals within a limited amplitude range. The apparatus and method provides for the situation wherein the digital data can represent an analog signal for which on a general decrease in amplitude increases may be superimposed. The apparatus includes a digital/analog converter whose reference voltage is individually determined for each sample. This reference voltage is taken from a saw tooth oscillator at an instant of time determined by a delay timer which responds to changes, with respect to a desired average amplitude, of the actual amplitude of the converted data.

REFERENCES:
patent: 3458859 (1969-07-01), Godfrey
patent: 3555540 (1971-01-01), Hartke
patent: 3685046 (1972-08-01), Howlett

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