[理工] [電子] 99台大電子
題目如網址:
http://www.lib.ntu.edu.tw/exam/graduate/99/99415.pdf
請問第四題
我直接用pi model列方程式可以得到和在書店看的詳解一樣的答案
不過想說用GmRo做看看 因為Gm蠻好求的
Ro我想說就是P1的drain看進去(rop並1/gmp)並上N1的drain看進去
N1的drain看進去剛好是common gate的輸出阻抗 source的地方再掛一個CG的輸入阻抗
但是我從P2的drain看進去的電阻算不太出來
有沒有高手可以幫忙解惑一下
還是不能用這方法做@@?
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