Absolute encoder and absolute value signal generation method
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United States of America Patent
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Sep 4, 2007
Grant Date -
Jun 9, 2005
app pub date -
Oct 24, 2002
filing date -
Dec 21, 2001
priority date (Note) -
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Abstract
An absolute encoder comprising a first memory operable to store a first absolute value signal produced every constant time period, the absolute value signal representing an absolute value position. A second memory stores a second absolute value signal produced in a previous time period. A comparing/calculating section compares the first absolute value and the second absolute value and produce a difference amount. A dividing process section divides the difference amount in an equal rate within a producing time period of said first absolute value signal. An interpolated absolute value signal producing section reads the second absolute value signal and adds the difference amount in a stepwise manner.
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