Mutual capacitance sensing circuits, methods and systems
US9013195B2 · kind B2 · utility
9Cited by
6References
12Claims
0Family size
Assignee
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Key dates
| Filing date | Jul 27, 2011 |
| Grant date | Apr 21, 2015 |
| Priority date | — |
| Expiry date | Jun 3, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0446
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A capacitance sensing system may include a first selection circuit that couples N electrodes of a first electrode set to a capacitance sense circuit; and a second selection circuit that couples M electrodes of a second electrode set, substantially simultaneously, to a signal generator circuit as a group to induce current in the N electrodes by mutual capacitance between the M and N electrodes; wherein N is at least one, and M>N.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.