Capacitance measurement system and methods
US9500686B1 · kind B1 · utility
5Cited by
320References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 27, 2011 |
| Grant date | Nov 22, 2016 |
| Priority date | — |
| Expiry date | Aug 2, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/960715
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A first capacitor and a second capacitor are charged until voltage at the second capacitor settles to a settling voltage. While charging, the first capacitor is alternately switched between a current source and ground. When the settling voltage is reached, charging of the first capacitor is halted. The second capacitor continues to be charged until voltage at the second capacitor reaches a reference voltage. The amount of time it takes for the settling voltage to reach the reference voltage corresponds to a measure of capacitance on the first capacitor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.