Method and apparatus for detection sensor shielding
US6593755B1 · kind B1 · utility
45Cited by
14References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 31, 2000 |
| Grant date | Jul 15, 2003 |
| Priority date | — |
| Expiry date | Jun 6, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/94026
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system and method are disclosed for shielding a capacitive sensor. The system and method drive the shield to the same potential as the sensor electrode being shielded to eliminate sensor interference due to mutual capacitance. An independently created signal is applied to the shield which matches the signal applied to the sensor electrode. Use of the independent driving signal allows the shield to maintain the same potential as the sensor electrode, especially during rapid transition of the sensor electrode's potential.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.