Signal processing circuit for encoder

Details Signal processing circuit for encoder Signal processing circuit for encoder

2006-11-28

2009-11-17

Lee, Benjamin C (Department: 2612)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S686200, C340S686400, C340S686100, C250S231130, C250S231140, C250S231160, C341S011000

Reexamination Certificate

active

07619537

ABSTRACT:
In an encoder which is equipped with two detectors arranged on both sides of a rotating shaft in order to eliminate an eccentricity error, the mounting of the detectors is facilitated by making provisions so as to not cause a problem in the calculating of an average even if the detectors happen to be so mounted that the difference between the angular values calculated from the outputs of the respective detectors becomes equal to 180°. In an initialization process after power on, the difference Δθ between the angular values θ1and θ2calculated from the signals output from the respective detectors is stored as an initial value. Position data θ is output by taking an average between θ3and θ2, where θ3is a value obtained by correcting θ1by the initial difference Δθ.

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