Time interval measurement

Details Time interval measurement Time interval measurement

1978-01-16

1979-08-21

Thesz, Joseph M.

Registers

Platform operated

Platform actuated traffic counters

235 92T, 235 92FQ, 235 92CC, 235 92R, 324187, 364569, G01R 2302, H03K 2130

Patent

active

041654595

ABSTRACT:
The interval between arrival of two time displaced signals is measured with a resolution less than 0.5 nanoseconds by electronic vernier techniques utilizing transferred electron logic device circuits. The first arriving signal triggers a first clock generator of pulse period T.sub.C, the pulses from which are counted by a first counter and a second counter. The second arriving signal triggers a second clock pulse generator having a pulse period T.sub.V, the first pulse therefrom disabling the first counter at a count of M. As T.sub.V <T.sub.C coincidence of the pulses from the two clock pulse generators will eventually occur causing disabling of the second counter at a count of N. Time interval .DELTA.T is computed from the formula: .DELTA.T=(N-1)T.sub.C -(N-M)T.sub.V.

REFERENCES:
patent: 2665411 (1954-01-01), Frady
patent: 3611134 (1971-10-01), McDowell
patent: 3801917 (1974-04-01), Weinstein
patent: 3840174 (1974-10-01), Craft
patent: 4031373 (1977-06-01), Beckwith
patent: 4079315 (1978-03-01), Mohr

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