Frequency hopping for a capacitive touch screen controller
US10795504B2 · kind B2 · utility
3Cited by
6References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 18, 2015 |
| Grant date | Oct 6, 2020 |
| Priority date | — |
| Expiry date | Nov 18, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2203/04105
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A circuit includes a force driver configured to apply a force signal to a force node associated with a mutual capacitance to be sensed. A sensing circuit receives a sense signal from a sense node associated with said mutual capacitance to be sensed. The sensing circuit operates to generate an output signal indicative of the sensed mutual capacitance. A control circuit controls generation of the force signal to alternate between at least two different frequencies and generate said output signal for each half cycle of the force signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.