Electric potential sensor
US8264247B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 13, 2007 |
| Grant date | Sep 11, 2012 |
| Priority date | — |
| Expiry date | Feb 12, 2028 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/291
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The present invention provides an electric potential sensor for the measurement of potentials non-invasively. The sensor comprises 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. Input impedance enhancing means are included for providing a high input impedance to the sensor amplifier for increasing the sensitivity of the electrode to reduced electric potentials, and a discrete pre-amplifier stage is arranged to co-operate with the sensor amplifier to reduce the input capacitance of the amplifier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.