Cyclic signal processing

Details Cyclic signal processing Cyclic signal processing

1995-08-21

1997-02-25

Trammell, James P.

Boots, shoes, and leggings

G06F 1700

Patent

active

056065140

ABSTRACT:
An arrangement and method for processing a cyclically varying signal to determine the time between equivalent points of successive signal cycles. A comparator receives the signal at one of its differential input terminals, the other input terminal receiving a reference voltage generated by a computer. The output of the comparator is coupled to a timer toggling input. The computer generates the reference voltage at either a trigger level or a level below the range of the signal. At first, the reference voltage is provided at the trigger level and after the comparator changes state, thereby starting the timer, the computer changes the reference voltage to the low level below the signal range. The computer changes the reference voltage back to the trigger level after a predetermined number of signal cycles, so that the next time the signal reaches the trigger level the timer is stopped.

REFERENCES:
patent: 4769597 (1988-09-01), Sano
patent: 4848148 (1989-07-01), Capriotti et al.
patent: 5094333 (1992-03-01), Minura
patent: 5202813 (1993-04-01), Uota et al.
patent: 5377282 (1994-12-01), Fellows et al.
patent: 5471130 (1995-11-01), Agiman

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