Electric potential sensor
US8054061B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 13, 2007 |
| Grant date | Nov 8, 2011 |
| Priority date | — |
| Expiry date | Oct 19, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R19/0023
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention provides an electric potential sensor including, at least one detection electrode arranged for capacitive coupling with a sample under test and for generating a measurement signal, and a sensor amplifier adapted to receive the measurement signal as input and to supply an amplified detection signal as output. An input impedance enhancing element provides a high input impedance to the sensor amplifier for increasing the sensitivity of the electrode to reduced electric potentials, and a feedback element applies a coherent feedback signal to the input of the sensor amplifier for enhancing the signal to noise ratio of the sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.