[SI-LIST] simulate isfet model using Hspice
- From: "Rozina Abd. Rani" <roz_ar78@xxxxxxxxx>
- To: si-list@xxxxxxxxxxxxx
- Date: Sun, 14 Sep 2003 19:07:31 -0700 (PDT)
Hi,
I'm new in ISFET biosensor area. I try make a simple circuit and doing
simulation to study isfet behaviour ( for ex: Ids Vs Vgs and etc.) using
T-Spice and H-spice. But, during simulation, i've got warning statements like
this:
**warning** ztoxn : is not level= 4 model parameter
**warning** zepsox : is not level= 4 model parameter
**warning** zepsil : is not level= 4 model parameter
**warning** zph : is not level= 4 model parameter
**warning** zdeff : is not level= 4 model parameter
**warning** zerel : is not level= 4 model parameter
**warning** zchieo : is not level= 4 model parameter
**warning** zphilj : is not level= 4 model parameter
**warning** zscon : is not level= 4 model parameter
**warning** znkap : is not level= 4 model parameter
**warning** zakap : is not level= 4 model parameter
**warning** zbkap : is not level= 4 model parameter
**warning** znox : is not level= 4 model parameter
**warning** znnit : is not level= 4 model parameter
For your information, i'm using this model for my isfet circuit ( n-channel
Al2O3-gate isfet).
.model isfet nmos level=4 tox=100n ld=0.8u xj=2u nsub=2e15 tpg=1
+ uo=520 rd=85 rs=85 lambda=0.02 nss=3e10 xqc=1
+ is=1f cgso=40p cgdo=40p cgbo=200p cj=200u
+ mj=0.5 cjsw=80n mjsw=0.33
+ ztoxn=90n zepsox=28.7 zepsil=0.1
+ zph=7.0 zdeff=1e-18 zerel=0.205 zchieo=3m
+ zphilj=1m zscon=100m znkap=0.0 zakap=12.6n
+ zbkap=0.79n znox=8e14 znnit=0.0
so, i hope anybody can help me by giving some explanation what the problem is
about or other knowledge about ISFET model.
Is it true that when we want to simulate for other pH value, we just change the
value of Zph?..am i right?...
rozina.
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