Method and apparatus for providing offset compensation

Details Method and apparatus for providing offset compensation Method and apparatus for providing offset compensation

1983-05-31

1986-03-18

Krass, Errol A.

Boots, shoes, and leggings

361 80, 364571, 364572, H02H 318

Patent

active

045772797

ABSTRACT:
An apparatus and method for removing a transient exponential noise signal from a sinusoidal signal. The effects of the transient are removed by sampling the sinusoidal signal, averaging the transient over a time interval corresponding to an integral number of cycles of the sinusoidal signal, and subtracting this average from the sample at the midpoint of the time interval. The result is a compensated sinusoidal signal wherein the effects of the transient have been removed. The time interval is progressively moved ahead to produce a complete compensated signal by subtracting the average of the exponential from the value thereof at the midpoint of each successive time interval.

REFERENCES:
patent: 4344150 (1982-08-01), McLaughlin
patent: 4455612 (1984-06-01), Girgis et al.
patent: 4493047 (1985-01-01), Werst
IEEE Power Engineering Conf., Jul. 13-18, 1980; "A Microcomputer Based Ultra-High Speed Distance Relay: Field Tests"; Phadke et al, pp. 1-8.

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