Gray code converter with error signal
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United States of America Patent
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Mar 19, 1991
Grant Date -
N/A
app pub date -
Feb 8, 1989
filing date -
Feb 11, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and circuit arrangement is disclosed for converting Gray code signals into counting pulses, forming a counter status, detecting interference signals infringing the Gray code and for forming an error signal with a network defining a finite automaton according to Moore or Mealy, wherein the network forms no error signal when a Gray code infringement is followed by a second Gray code infringement. The disclosed network arrangement in one embodiment comprises a quadruple interpolator (quadrature decoder) for precision dimension measuring machines with optoelectronic scale scanning. Interruptions of the measuring procedure and errors are reduced by not generating an error signal when a Gray code infringement is followed by a second Gray code infringement.
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