Digital differential detection for touch sensors
US10528204B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 11, 2018 |
| Grant date | Jan 7, 2020 |
| Priority date | — |
| Expiry date | May 11, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V40/1347
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system and method for digital differential detection includes a capacitive sensor having a first node and a second node, a transmitter configured to transmit an input signal through the first node and the second node, and a receiver coupled to the first node and the second node. The receiver is configured to receive a first modified input signal from the first node and a second modified input signal from the second node. The receiver includes first and second analog-to-digital converters configured to convert the first modified input signal to a first digital signal and the second modified input signal to a second digital signal. The receiver also includes a first differencing circuit configured to calculate a first difference between the first digital signal and a second digital signal and a decision circuit configured to output a result according to the first difference.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.