Journal
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
Volume 53, Issue 2, Pages 238-242Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TIM.2003.822476
Keywords
CMOS optical sensor; color measurement; sigma-delta converter
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An integrated silicon color sensor system has been designed and fabricated in CMOS without extra masks for color filtering. The application is in low-cost measurement of ambient light conditions, e.g., for display control in portable instruments, or for testing the intensity and spectral distribution of light sources. Signals proportional to the intensity and the spectral distribution of the incident light are available at the output in the form of two bit-streams. It is demonstrated that daylight can be distinguished from other light sources, such as incandescent lamps and fluorescent lamps.
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