Electrostatic voltmeter
US7439746B2 · kind B2 · utility
2Cited by
8References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 27, 2006 |
| Grant date | Oct 21, 2008 |
| Priority date | — |
| Expiry date | Oct 27, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R19/0023
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An electrostatic voltmeter has an input sensing terminal, a first operational amplifier, a second operational amplifier, a first reference voltage terminal electrically connected to the non-inverting input of the second operational amplifier, a low reference voltage terminal electrically connected to the output of the second operational amplifier, and a voltage indicator, electrically connected between the low reference voltage terminal and the first reference voltage terminal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.