Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Analysis of complex waves
Patent
1987-05-27
1989-01-03
Levy, Stewart J.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Analysis of complex waves
324 78R, G01R 2316
Patent
active
047959703
ABSTRACT:
Apparatus for measuring frequency includes a first period measuring counter (14) arranged to measure a periodic signal and generate a counter enable signal an integer number of cycles long, and a second period measuring counter (15) arranged to measure frequency of an input signal over a gate period given by the counter enable duration. The apparatus may be used to remove dither in the measurement of carrier frequency of FM signals.
REFERENCES:
patent: 3304504 (1967-02-01), Horlander
patent: 3909714 (1975-09-01), Nakano
patent: 4420809 (1983-12-01), Pierce
Arana Louis M.
Levy Stewart J.
Marconi Instruments Limited
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