Half normal frequency regime phase encoding in cordless digitizers
US5373118A · kind A · utility
44Cited by
12References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 25, 1993 |
| Grant date | Dec 13, 1994 |
| Priority date | — |
| Expiry date | Oct 25, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/046
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A device for imparting a signal phase status of an alternating current (AC) magnetic field signal transmitting from a cursor in a cordless digitizer. The device includes an apparatus for causing the cursor to temporarily emit a signal having a frequency which is lower than the frequency of a basic cursor signal, and an apparatus for determining and imparting the signal phase status of the AC magnetic field signal transmitting from the cursor as derived from the temporarily emitted lower frequency signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.