Frequency counter and method

Details Frequency counter and method Frequency counter and method

1977-12-19

1979-04-17

Smith, Jerry

Boots, shoes, and leggings

324 78D, 324 79D, 364701, G01R 2302, G06F 1520

Patent

active

041504321

ABSTRACT:
An averaging frequency counter for determining the frequency of recurrence of input signals has an event counter for counting a number of the input signals, a gate counter for counting a number of time intervals during which the input signals are counted, and a time interval measurement circuit for measuring the cumulative duration of the time intervals. A systematic error associated with the measurement of the duration of each time interval is determined during an application of a calibrated frequency to the averaging frequency counter by dividing a calculated total time error by the number of time intervals. The systematic error is subsequently used to correct a measurement of an unknown frequency during an application of the unknown frequency to the averaging frequency counter by subtracting a product of the number of the time intervals and the systematic error from the cumulative duration.

REFERENCES:
patent: 3304504 (1967-02-01), Horlander
patent: 3555256 (1971-01-01), Westlake
patent: 3609326 (1971-09-01), Bagley et al.
patent: 3631343 (1971-12-01), Schmidhauser
patent: 4073432 (1978-02-01), Schroder

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