Signal extraction apparatus and method
US5115128A · kind A · utility
24Cited by
4References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 29, 1989 |
| Grant date | May 19, 1992 |
| Priority date | — |
| Expiry date | Dec 29, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/268
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A resonant beam sensor is excited into resonance by directing onto it a drive signal comprising light which has been amplitude modulated at the resonant frequency. A portion of the drive signal reflected by the sensor is demodulated by a photodetector to provide a measurement signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.