High resolution optical encoder systems having a set of light detecting elements each comprising a pair of complementary detectors (as amended)
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United States of America Patent
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May 29, 2012
Grant Date -
May 19, 2011
app pub date -
Nov 14, 2009
filing date -
Nov 14, 2009
priority date (Note) -
Expired
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Abstract
Disclosed are various embodiments of front-end analog circuitry for use in conjunction with optical encoders. Highly accurate analog output signals are provided by front-end analog circuitry in incremental or absolute motion encoders to interpolation circuitry, which is capable of providing high interpolation factor output signals having high timing accuracy. The disclosed interpolation circuits may be implemented using CMOS or BiCMOS processes without undue effort.
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