Instrument for determining coincidence and elapse time between independent sources of random sequential events
AssigneeThe United States of America as represented by the Administrator of the National Aeronautics and Space Administration
InventorJames I. Clemmons, Jr.
Life of this patent
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Abstract
An instrument that receives pulses from a primary external source and one or more secondary external sources and determines when there is coincidence between the primary and one of the secondary sources. The instrument generates a finite time window (coincidence aperture) during which coincidence is defined to have occurred. The time intervals between coincidence apertures in which coincidences occur are measured.
Claims7
An instrument for determining coincidence between a primary external source of pulses and one or more other external sources of pulses comprising:
- means receiving said primary external source of pulses for generating a start pulse, a reset pulse and a coincidence aperture pulse each time a primary external source pulse is received;
- means receiving said coincidence aperture pulse and the pulses from said other external sources of pulses for producing a coincidence pulse each time a pulse from said other external sources of pulses coincides with said coincidence aperture pulse;
- and
- means receiving said start pulses, said reset pulses and said coincidence pulses for measuring the time intervals between coincidences.
Dependencies are inferred from the claim text.