Frequency measurement method and device

Details Frequency measurement method and device Frequency measurement method and device

1985-02-11

1987-06-02

Tokar, Michael J.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

324 79D, G01R 2300

Patent

active

046707123

ABSTRACT:
For measuring the frequency of a sine shaped signal accompanied by noise, for example Gaussian noise, in an input signal, that input signal is applied to two measuring arms, possibly after heterodyning. One arm includes a counter for counting the zero crossings of the signal. The other arm includes a derivator and a second counter for counting zero crossings. A processing circuit determines the frequency and the signal-to-noise ratio from the measurements.

REFERENCES:
patent: 2911641 (1959-11-01), Kohler
patent: 3403338 (1968-09-01), Martin

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