[理工] [電子] MOS 電流鏡
http://www.lib.nthu.edu.tw/library/department/ref/exam/eecs/ee/98/5001.pdf
有幾個小地方的想法不知道對不對
第12題 電流比例是直接看下面M2、M4的幾何比例嗎?
第16題的Rin是500歐姆對嗎?
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