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Design methods and apparatuses of photodiodes with adaptive structure to achieve smooth and wavelength-selective photo-responses
Design methods and apparatuses of photodiodes with adaptive structure to achieve smooth and wavelength-selective photo-responses
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机译:具有自适应结构的光电二极管的设计方法和装置,可实现平滑和波长选择的光响应
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摘要
The design methods and apparatuses of photodiodes with adaptive structures to achieve smooth and wavelength-selective responses are proposed. By using the adequate sizes of the photo-sensing areas and gains of the back-end amplifiers towards the different photo-responses of multiple photodiodes, the photo-responses from these photodiodes are summed together to yield the uniform distribution of the total photo-responses. Based on the physical characteristics of the process parameters, the equation of the photo-responses for the PN junction is derived to find the optimized values of the process parameters for increasing the photo-response and achieving the peak value of the photo-responses at a specific wavelength. The photodiode with multiple PN junctions and multiple switches is designed to achieve multiple photo-responses in a single photodiode. By using the switches to turn off the unused PN junctions, the selected PN junctions can generate the required photo-responses. Hence, this kind of the photodiode can sense multiple colors without using color filters.
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