Signal conditioning circuitry
US7442915B2 · kind B2 · utility
0Cited by
4References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 22, 2005 |
| Grant date | Oct 28, 2008 |
| Priority date | — |
| Expiry date | Nov 8, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0312
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
This invention relates to signal conditioning circuitry 14a for an optical pointing device, the circuitry comprising: means 15a for determining the rate of change of a signal generated on periodic illumination of a photodetector, and outputting a signal representative of said determined rate of change; and means 17a for comparing the signal output by said determining means to a reference voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.