Tim,
what about controlled sources ? With the nonlinear ones (BISRC and BVSRC)
you can use mathematical functions to describe their behaviour. Combining
some of them might get you the right transfer functions.
Yes, you can write your own models or subcircuits (maybe using nonlinear
sources) for special devices but you really have to know a little bit about
SPICE / XSPICE (and have proper literature). Unfortunately Protel gives not
much technical support for the simulator. I remember having seen models for
mechanical devices like motors and loudspeakers in SPICE but can't remember
where.
It could have been at www.intusoft.com or  www.pspice.com (you may have to
register to get into the support area and be aware that PSPICE is no XSPICE
simulator and has some functions of its own).

Rolf Molitor
Ing.Buero i2e
Remscheid / Germany


-----Ursprüngliche Nachricht-----
Von: "Tim Hutcheson" <[EMAIL PROTECTED]>
An: "peda" <[EMAIL PROTECTED]>
Gesendet: Mittwoch, 21. August 2002 17:54
Betreff: [PEDA] Simulating with load transfer function


> I want to add the transfer function of my load to a simulation but can't
> find a Protel simulation part that lets me do what I want.  I would expect
> to find a simulation part in the library that would let me use a table
> lookup or a functional form.  Has anyone done this?  Perhaps I need to
> create something like a Spice subckt to do this.  Has anyone done that?
> This would be used to couple the mechanical response of the load to the
> electrical circuit.
>
> Once I have the physical load modeled, I would want to do something
similar
> with the driving source, but as the compensation needed to equalize the
> output by frequency.  This is pretty much the inverse of the load function
> but not exactly and the resulting function will determine a DAC lookup
> compensation table.
>
> I may have completely overlooked something but I don't see how to do it
> directly without resorting to spice programming.
>
> Any ideas much appreciated.
>
> regards,
>
> Tim Hutcheson
> Research Associate
> Institute for Human and Machine Cognition
> University of West Florida
> 40 S. Alcaniz St.
> Pensacola, FL 32501
> USA
> 805-202-4461
>
>
> ************************************************************************
> * Tracking #: 86B90ED2BA1C79408118BE47018CEDDC805F5D1A
> *
> ************************************************************************

* * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* To post a message: mailto:[EMAIL PROTECTED]
*
* To leave this list visit:
* http://www.techservinc.com/protelusers/leave.html
*
* Contact the list manager:
* mailto:[EMAIL PROTECTED]
*
* Forum Guidelines Rules:
* http://www.techservinc.com/protelusers/forumrules.html
*
* Browse or Search previous postings:
* http://www.mail-archive.com/proteledaforum@techservinc.com
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * *

Reply via email to