Encoder output signal correction apparatus and method

Details Encoder output signal correction apparatus and method Encoder output signal correction apparatus and method

2006-09-19

2006-09-19

JeanPierre, Peguy (Department: 2819)

Coded data generation or conversion

Phase or time of phase change

Synchro or resolver signal

C341S155000

Reexamination Certificate

active

07109900

ABSTRACT:
A third harmonic distortion corrector is equipped for correcting a third harmonic distortion contained in a two-phase sinusoidal signals with different phases output from an encoder. A third harmonic calculator/detector calculates the amplitude a3and the phase φ3of the third harmonic using Fourier analysis, based on change in radius r of the Lissajous waveform output from a r-θ converter. The third harmonic distortion corrector corrects the third harmonic distortion of the two-phase sinusoidal signal A4,B4based on the amplitude a3and the phase φ3of the third harmonic calculated.

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