Apparatus for determining interval between two events

Details Apparatus for determining interval between two events Apparatus for determining interval between two events

1981-12-01

1984-08-28

Krass, Errol A.

Boots, shoes, and leggings

377 20, G04F 800, H03K 5159

Patent

active

044687460

ABSTRACT:
The interval between first and second events, which may occur in a period less than a nanosecond interval, is determined with a square wave clock source started in response to the first event. The source derives a square wave having a first transition when started and equally spaced succeeding transitions spaced from each other by T/2, where T is the square wave period. A delay network having N taps is responsive to the square wave, whereby (N+1) square waves are derived. The taps are spaced from each other so the clock source square wave is delayed at tap k by kT
, where n is a predetermined integer greater than 1 and k is selectively every integer from 1 to N. (N+1) memory elements respectively respond to the (N+1) square waves to generate a signal indicative of which half cycle of each of the (N+1) square wave is being derived when the second event occurs.

REFERENCES:
patent: 2831126 (1958-04-01), Gross

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