cpe spice model

[Kay-Uwe Loebel]

Hello,

a friend of mine asked me to post his problem here:

For modelling a sensor for simulation with spice (PSPICE) I need a
model for an element called CPE (constant phase element).
This element has two pins. As a formula I found:
Qn=Qc *(jw)exp(-n) w=> omega
0<=n<=1
for n=0 Qn => R
for n=1 Qn => C
for n=0.5 Qn => Warburg impedance (a special case of CPE).
Could any help me modelling this CPE.

Kay

--
Kay-Uwe Loebel
Technische Universitaet Chemnitz
mailto:loe...@e-technik.tu-chemnitz.de
http://www.infotech.tu-chemnitz.de/~bauel/loebel.html

[S Y Ma]

Kay-Uwe Loebel wrote:

Try ftp.ee.ualberta.ca

under /pub there are many subdirectories. One of the is solely
dedicated for spice models.

-SY

[Kay-Uwe Loebel]

S Y Ma wrote:

>
> Kay-Uwe Loebel wrote:
> > For modelling a sensor for simulation with spice (PSPICE) I need a
> > model for an element called CPE (constant phase element).

> >[...]

>
> Try ftp.ee.ualberta.ca
>
> under /pub there are many subdirectories. One of the is solely
> dedicated for spice models.

Thank you for your hint.
I saw through the server, but found only spice models of some
specific manufacturers like AD, TI and NS.

Regards