Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Phase comparison
Patent
1985-06-10
1987-03-31
Tokar, Michael J.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Phase comparison
307516, 324 83R, 328134, 328155, G01R 2508
Patent
active
046545867
ABSTRACT:
A digital phase meter to measure the phase difference between an input signal and a reference signal and output this phase information in the form of an eight bit number. The input signal and the reference signal, which are sinusoidal, are conditioned to a more defined leading edge by a high speed differential voltage comparator and a dual/differential line receiver. A series of uniquely configured D flip-flops are used to detect the leading edge of both the signal input and the reference input. An AND gate then acts as a switch that is activated on the leading edge of the signal input. The time interval between the two positive leading edges of the input signal and reference signal specifies the phase difference. The AND gate is in the high state for this duration. The phase difference is converted into an 8-bit binary number via two 4-bit cascaded counters. The high output of the AND gate is used to enable the counters for the duration of the phase difference.
REFERENCES:
patent: 3469196 (1969-09-01), Cowin et al.
patent: 3553579 (1971-01-01), Teixeira
patent: 3663956 (1972-05-01), Purdy et al.
patent: 3820022 (1974-06-01), Watt
patent: 3953794 (1976-04-01), Moore
patent: 4025848 (1977-05-01), Delagrange et al.
patent: 4070618 (1978-01-01), Thomas
patent: 4600994 (1986-07-01), Hayashi
Evans, Jr. Joseph T.
Heck Kevin M.
Hren Alisa M.
Munechika Stacy M.
Norris Michael C.
O'Shea Kevin D.
Singer Donald J.
Stepanishen William
The United States of America as represented by the Secretary of
Tokar Michael J.
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