Low power sensing apparatus for digitizer tablets
US5066833A · kind A · utility
23Cited by
8References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 13, 1990 |
| Grant date | Nov 19, 1991 |
| Priority date | — |
| Expiry date | Nov 13, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/046
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A digitizer tablet consuming less power than is required of current tablets comprises short duration fast rise time energizing pulses, and a resonant circuit in the induced signal detector tuned to the frequency of the pulse repetition rate or preferably a higher frequency. Peak detector or timed sample and hold circuits are connected to the resonant circuit to improve resolution and reduce noise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.