如何模擬MOS的電容

andrew_wee

請教諸位，在cadence下如何模擬mos管的寄生電容隨Vgs變化而變化的情況？具體情況如附件所示。

tangent

HSPICE 可以使用LX18或是查詢manual!!

vinsonsu

you can reference HSPICE example.
" l6 {4 E. R4 U/ z( p  d6 m  E' `0 f% V, }% Kit's have example file to do this simulation

gyamwoo

我都下這樣的指令，詳細你看看手冊
.OPTION DCCAP
! f/ D, s- \2 s" X) y.PRINT cdtot=CAP(mos_drain) dgtot=CAP(mos_gate) ...
9 i2 n3 m# W! X% }7 }9 C& `CAP(NODE) NODE是指你想知道電容值的端點

andrew_wee

Thank you,super!i find it! Maybe it is helpful for me,i hope that!

super

you can reference HSPICE example.
% J. J$ h3 i! j$ I1 l: y) L4 Fit's have example file to do this simulation.

andrew_wee

Thank you seanyang1337! Please tell more details, i can't get your idea completely. My email is    andrew_wee@163.com

seanyang1337

Dear andrew,
9 F: ]! N; _- a4 IIt is easy, make sure your mos was connected like an capacitor.
Using calculator-> op to mos, choose the cgs, then get express to your output.
Then, use the parametric analysis to sweep Vg.
You will see that !!!!

tianruo

use DC simulation？you can try it。