Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Phase comparison
Patent
1978-11-13
1980-11-18
Tokar, Michael J.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Phase comparison
368121, G01R 2500
Patent
active
042348455
ABSTRACT:
Both positive and negative time interval measurements between start and stop channel signals are made without ambiguity during repetitive measurements. Circuitry monitors the start and stop channel signals and automatically changes the arming of the measurement circuitry whenever drifting of the signals requires a change in arming. Once the start or stop channel event is chosen as the initial source of the arming signal, subsequent arming signal selections are accomplished automatically.
REFERENCES:
patent: 3286176 (1966-11-01), Birnboim
patent: 3579104 (1971-05-01), Pignard
patent: 3760270 (1973-09-01), Irvin
patent: 4000466 (1976-12-01), Scouten et al.
patent: 4025848 (1977-05-01), Delagrange
Boone David A.
Hewlett--Packard Company
Tokar Michael J.
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