Time interval measurement method and apparatus

Details Time interval measurement method and apparatus Time interval measurement method and apparatus

1975-04-18

1976-12-21

Segal, Robert

Electricity: measuring and testing

Electrical speed measuring

Including 'event' sensing means

324 78E, 324 78J, 324185, G04F 800

Patent

active

039991288

ABSTRACT:
A method and apparatus is disclosed for providing accurate time interval measurements in an oscilloscope. A first voltage which is proportional to the time position of a first selected point along a linear time-base sweep is stored and applied to a subtractor circuit. A second voltage proportional to the time position of a second selected point along the sweep is applied to the subtractor, and the difference between the first and second voltages is obtained. This difference, which is proportional to the time interval between the first and second selected points, is applied to a digital voltmeter calibrated to provide a display in time units.

REFERENCES:
patent: 2874352 (1959-02-01), Durbin
patent: 3553597 (1971-01-01), Bugay
patent: 3619574 (1971-11-01), Mindheim
patent: 3675643 (1972-07-01), Funfstuck
patent: 3781677 (1973-12-01), Hagen

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