| 摘要 |
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 TC, 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 TV, the first pulse therefrom disabling the first counter at a count of M. As TV<TC 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)TC-(N-M)TV.
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