Measuring circuit for photo-receiving intensity of photosensor

Details Measuring circuit for photo-receiving intensity of photosensor Measuring circuit for photo-receiving intensity of photosensor

1983-02-18

1985-12-03

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250214R, 250214P, 307311, 356226, G01J 146, H01J 4014

Patent

active

045567891

ABSTRACT:
A measuring circuit for measuring the light intensity received by a photosensor comprises a photosensor which generates photocurrent proportional to the intensity of received light, an integration circuit for integrating the photocurrent generated and for measuring the intensity of light by measuring the time period from the start of integration until the integrated value reaches a predetermined level. In order to provide a wider dynamic output range, a signal generator which produces a monotonously changing voltage signal is connected to add its signal to the integrated signal.

REFERENCES:
patent: 2948815 (1960-08-01), Willems et al.
patent: 3574443 (1971-04-01), Nanba
patent: 3859519 (1975-01-01), Weischedel
patent: 3864565 (1975-02-01), Kawasaki
patent: 4320302 (1982-03-01), Stein

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