Capacitive current sensing using a current feedback amplifier
US9606151B2 · kind B2 · utility
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3References
13Claims
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Key dates
| Filing date | Jul 9, 2014 |
| Grant date | Mar 28, 2017 |
| Priority date | — |
| Expiry date | Oct 1, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45528
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A circuit for sensing current in a capacitive network. A first capacitor carries a first current. A second capacitor is connected to the first capacitor thereby forming a current divider. The second capacitor carries a second current which is proportional to the first current. A transimpedance amplifier is connected to the second capacitor and has a voltage output that is proportional to the second current. Using a current feedback amplifier as the transimpedance amplifier significantly improves bandwidth and stability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.