Gray code converter with error signal
US5001479A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 8, 1989 |
| Grant date | Mar 19, 1991 |
| Priority date | — |
| Expiry date | Feb 8, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M13/00
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.