Horology: time measuring systems or devices – Time interval – Electrical or electromechanical
Patent
1997-10-14
2000-06-27
Roskoski, Bernard
Horology: time measuring systems or devices
Time interval
Electrical or electromechanical
G04F 800
Patent
active
060814845
ABSTRACT:
Apparatus and method for measuring the time interval between a first event and a second event in a tester system. First and second time measurement circuits independently receive respective first and second events. The time measurement circuits each includes a coarse counter clocked by the master clock. The first coarse counter is activated by an initial event, and the first coarse counter stops counting upon activation of the first event. The second coarse counter is also activated by the initial event, and the second coarse counter stops counting upon activation of the second event. A first fine counter clocked by the master clock produces a count value representing the time interval between the first event and a first leading edge of the master clock. A second fine counter clocked by the master clock produces a count value representing the time interval between the second event and a second leading edge of the master clock.
REFERENCES:
patent: 5428648 (1995-06-01), Fukuda
patent: 5717704 (1998-02-01), Rosenfeld
Roskoski Bernard
Schlumberger Technologies Inc.
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