Frequency measurement

Details Frequency measurement Frequency measurement

1989-12-05

1991-05-28

Hellner, Mark

Communications: directive radio wave systems and devices (e.g.,

With particular circuit

324 78R, 342192, H04B 700

Patent

active

050198238

ABSTRACT:
An apparatus for measuring the frequency of an input signal is described. The apparatus uses a quadrature sampling system to obtain values of the instantaneous phase of the signals at a succession of time intervals, the values being converted into cumulative phase values. An estimate of the frequency is obtained by determining the gradient of the straight line which would best pass through a plot of the values of cumulative phase against time.

REFERENCES:
patent: 4249179 (1981-02-01), Kolacny
patent: 4504786 (1985-03-01), Slaughter
patent: 4542657 (1985-09-01), Barber et al.
patent: 4633516 (1986-12-01), Tsui
patent: 4743905 (1988-05-01), Wiegan

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