Apparatus for producing analog-to-digital conversions

Details Apparatus for producing analog-to-digital conversions Apparatus for producing analog-to-digital conversions

1976-02-02

1978-08-29

Sloyan, Thomas J.

Communications: electrical

Audible indication

Percussion-type sound producer

340347M, H03K 1302

Patent

active

041107470

ABSTRACT:
Analog signals are converted into digital form in a reproducible, accurate and stable manner. The tri-dual phase technique involves the conversion of the condition to be measured, and typically represented by a voltage, first to a reference level and then to an unknown level in a dual phase conversion, and then solving for the unknown level once the relationship of the reference level, the unknown high input level, and the unknown low input levels are established. A circuit capable of carrying out the technique includes an integrator receiving voltage input signals from a switching device adapted to switch to three different input signals, including a high unknown signal level, a low unknown signal level, and a known signal reference level. The reference level is also fed into a comparator which receives the output of the integrator. Calculating circuitry is provided for the output of the comparator for processing the output and presenting the results thereof in a digital display format or other digital output.

REFERENCES:
patent: 3185820 (1965-05-01), Williams et al.
patent: 3500196 (1970-03-01), Cooper
patent: 3555298 (1971-01-01), Neelands
patent: 3566265 (1971-02-01), Reid
patent: 3654560 (1972-04-01), Cath et al.
patent: 3710376 (1973-01-01), Fluegel
patent: 4031533 (1977-06-01), Neumann

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