Fully integrated blue/UV SOI CMOS photosensor for biomedical and environmental applications
In this paper, we present a microsystem for measuring optical power in blue/UV wavelengths (from lambda = 200 nm to lambda = 450 nm) which includes a photodiode and the analog processing circuit of the photodiode signal, fully integrated in 2 mu m SOI CMOS technology. The photodiode has a maximum responsivity for lambda = 400 nm. Th photosensor functions as a current to frequency converter. Measurements of the microsystem illuminated by blue and UV LEDs demonstrate the good linear behavior, sensitivity and efficiency of the system.
uv soi cmos photosensor microsystem integrated circuit blue light