Circuit arrangement for a touch sensor
US12248644B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 6, 2023 |
| Grant date | Mar 11, 2025 |
| Priority date | — |
| Expiry date | Jul 6, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0443
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A circuit arrangement for a touch sensor includes a plurality of capacitive sensors, an ADC, a switch arrangement, and a controller. The capacitive sensors measure over a respective sampling period for detecting a touch event on a surface and provide an output. The ADC receives the output and determines a digital value over a conversion period. The switch arrangement selectively provides the output from the capacitive sensors to the ADC. The controller activates a first capacitive sensor to measure the capacitance for detecting a touch event, and activates a second capacitive sensor for detecting a touch event such that the respective sampling periods are at least partly concurrent. The controller also controls the switch arrangement to cause the ADC to receive the output of the first capacitive sensor after its sampling time and receive the output of the second capacitive sensor after its sampling time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.