Method and device for multichannel analog detection
US5286968A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 10, 1992 |
| Grant date | Feb 15, 1994 |
| Priority date | — |
| Expiry date | Mar 10, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B11/303
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to a device for multichannel analog detection of a signal to be detected having a very good signal/noise ratio. It incorporates a modulator (53) producing a modulated signal S(P); means of synchronous attenuation (54) of variable phase .PHI. producing an attenuated modulated signal; a multipoint receiver (52) receiving the modulated-attenuated signal and producing for each point a primary analog signal; an integrator producing for each point a value V(P,.PHI.) resulting from the integration over N periods of the primary analog signal; means of reading, of digitizing and of storing the values V(P,.PHI.) for a given .PHI. value; a phase sequencer giving .PHI. the values .PHI..sub.0 +i2.pi./n successively where i is an integer varying from 1 to n; a digital processing unit making it possible to obtain data representative of S(P) from the values V(P,.PHI.). It is particularly well adapted to the detection of a luminous flux with an array of photodiodes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.