Quadrature error correction

Details Quadrature error correction Quadrature error correction

1991-04-01

1992-07-28

Williams, Howard L.

Coded data generation or conversion

Phase or time of phase change

Synchro or resolver signal

341112, 318605, H03M 164

Patent

active

051344041

ABSTRACT:
A method of correcting quadrature signal errors comprises the steps for generating an error function signal E by summing the squares of the quadrature signals and subtracting a constant K therefrom, saving the value of the error function E at .theta. equals approximately 0, .pi./2, .pi., and 3.pi./2, using the saved values of the error function to generate signals indicative of the quadrature errors, and generating corrected quadrature signals by processing the quadrature signals to eliminate the errors.

REFERENCES:
patent: 4075698 (1978-02-01), Lode
patent: 4352050 (1982-09-01), Sakano
patent: 4472669 (1984-09-01), Denham et al.
patent: 4482855 (1984-11-01), Otsuka et al.
patent: 4792739 (1988-12-01), Nakamura et al.
patent: 4992716 (1991-02-01), Ellis

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