Data acquisition from capacitive touch pad
US7075523B2 · kind B2 · utility
16Cited by
5References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 28, 2003 |
| Grant date | Jul 11, 2006 |
| Priority date | — |
| Expiry date | Oct 28, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0446
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A Circuit (in FIG. 1) and an Algorithm for Data Acquisition from Capacitive Touch Pad Sensor employs charge transfer to sense capacitance. The circuit has high degree of noise rejection from both system and externally generated noises; it is resistant to the effects of ESD; utilizes a general purpose “off the shelf” components and programmable microcontroller (element 10), providing flexibility for changes and adjustments without incurring the high costs of a custom IC design. A settling time and low sensitivity to the noise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.