Apparatus and method for monitoring radiant energy signals with variable signal gain and resolution enhancement
US5138149A · kind A · utility
15Cited by
9References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 5, 1990 |
| Grant date | Aug 11, 1992 |
| Priority date | — |
| Expiry date | Sep 5, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2201/124
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A sensor board for use with an endpoint controller which monitors light intensity is provided. The sensor board can provide a dynamic range of up to five million because a constant current driver and phase sensitive detector help eliminate noise from the detected signal. The sensor board can also subtract a DC voltage offset from the detected signal and amplify the difference to provide increased resolution of small changes in the detected signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.