Switching circuit and operation method
US11082041B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 3, 2019 |
| Grant date | Aug 3, 2021 |
| Priority date | — |
| Expiry date | Dec 3, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/14
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A switching circuit includes a live wire power obtaining circuit, a control circuit, and a tunable capacitor array. The live wire power obtaining circuit is coupled to a live wire to receive an alternating current (AC) voltage. The control circuit is configured to perform a zero-crossing detection to the alternating current voltage. The tunable capacitor array is coupled to the live wire power obtaining circuit and the control circuit. The control circuit is configured to control the live wire power obtaining circuit to supply power to the control circuit or the tunable capacitor array to discharge to supply power to the control circuit based on a state of a first switch and a zero-crossing detection result.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.