作者kj66 (无聊的夏天)
站内Electronics
标题Re: [问题] layout的电容计算(P币500)
时间Wed Jun 25 08:29:39 2008
※ 引述《ROSE13 (ROSE)》之铭言：
: 图:
: http://tinyurl.com/5reh94
: For a saturated NMOS device having W=50um,L=0.5um,calculate all
: of the capacitances. Assume the minium(lateral) dimension of the
: S/D areas is 1.5um and the device is filded as shown in 图b
: 应该是要计算Cdb,Csb,Cgd,Cgs
: 500 P币不诚敬意，万请大大帮忙!感谢
接面电容刚好例题有..不过我不会算= =
写公式出来
for (a)
Cdb=Csb=WECj+2(W+E)Cjsw
for (b)
Cdb=(W/2)*ECj + 2(W/2 + E)Cjsw
Csb=2[(W/2)*ECj+ 2(W/2 + E)Cjsw]
=WECj+2(w+2E)Cjsw
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1F：推 ROSE13:3Q！虽然不是完整，还是给你吧 06/25 10:52