Apparatus and method for detecting a variable capacitance
US9952267B2 · kind B2 · utility
4Cited by
5References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 18, 2016 |
| Grant date | Apr 24, 2018 |
| Priority date | — |
| Expiry date | Nov 4, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/960725
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention relates to a novel means and a novel method for detecting a capacitance connected to AC power, which detect a sensor capacitance on the basis of a charge sharing phenomenon occurring due to a difference between voltages applied to a sensor capacitor and an auxiliary capacitor connected to a detection system when an AC voltage applied to the detection system alternates. According to the present invention, since the sensitivity of a signal detected by a detection system is improved, a magnitude and a change amount of a sensor capacitance are stably acquired.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.