Semiconductor color sensor detection circuit

Details Semiconductor color sensor detection circuit Semiconductor color sensor detection circuit

1985-05-14

1987-09-08

Rosenberger, R. A.

Optics: measuring and testing

Optical pyrometers

Plural color responsive

307492, 328145, G01J 560

Patent

active

046920250

ABSTRACT:
In a semiconductor color sensor circuit with two photodiodes having mutually different wavelength sensitivity characteristics, the ratio of numbers or areas of two types of transistors for logarithmic compression of signals from these photodiodes is adjusted so that errors in output voltage due to changes in temperature can be reduced and the dynamic range of illuminance of incident light can be enlarged.

REFERENCES:
patent: 4309604 (1982-01-01), Yoshikawa et al.

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