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。

tianruo

use DC simulation？you can try it。

seanyang1337

Dear andrew,
It 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.
/ ^4 A' }0 n8 \5 p/ W# PThen, use the parametric analysis to sweep Vg.
: G/ n  k8 D% h: k: d- rYou will see that !!!!

andrew_wee

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

super

you can reference HSPICE example.
$ _7 f3 T# p1 w2 t3 D# Z! Uit's have example file to do this simulation.

andrew_wee

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

gyamwoo

我都下這樣的指令，詳細你看看手冊
.OPTION DCCAP
.PRINT cdtot=CAP(mos_drain) dgtot=CAP(mos_gate) ...
! p9 Y( \' q  ^$ p4 [& bCAP(NODE) NODE是指你想知道電容值的端點

vinsonsu

you can reference HSPICE example.
  d6 m  E' `0 f% V, }% Kit's have example file to do this simulation

tangent

HSPICE 可以使用LX18或是查詢manual!!