Capacitive sensor device with selective loading and coupling measurement mode
US12269404B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 7, 2020 |
| Grant date | Apr 8, 2025 |
| Priority date | — |
| Expiry date | Nov 18, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/96078
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A capacitive measurement circuit for a capacitive sensing device having a plurality of antenna electrodes includes: a measurement signal voltage source, a remotely controllable switching unit, and a current measurement circuit. The switching unit includes a plurality of ports and switching members that are configured to provide connections between selected ports. The measurement signal voltage source and the current measurement circuit are operatively connected to a distinct port. Each antenna electrode is individually connectable to a distinct port. The switching unit is configured to connect, within a same measurement cycle, each of the antenna electrodes to the voltage output port and the current measurement circuit for loading mode operation. The switching unit is further configured to connect at least one of the antenna electrodes to the voltage output port and at least one other antenna electrode of the antenna electrodes to the current measurement circuit for coupling mode operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.