Encoder interpolation circuit which corrects an interpolation angle between a received sine-wave encoder signal and a cosine-wave encoder signal
US6188341A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 8, 1998 |
| Grant date | Feb 13, 2001 |
| Priority date | — |
| Expiry date | Jul 8, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/303
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An encoder interpolation circuit for obtaining interpolation data within one wave from two sine-wave encoder signals of different phases comprises interpolative computation means (2) for receiving two sine-wave encoder signals received and carrying out to interpolative computation within one wave, signal deviation detecting means (3) for detecting a deviation of the two sine-wave encoder signals, correction data forming means (4) for outputting correction data corresponding to the detected deviation and the output of the interpolative computation means, and corrective computation means (5) for obtaining the corrected interpolation data by carrying out corrective computation for the output of the interpolative computation means with the correction data and obtaining corrected interpolation data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.