[Magic-dev] RE: Diodes -- IRSIM representation

[Muzaffer Simsir]

Dear Dr Timothy Edwards,

Thank you very much for your reply. I am planning to do simulations on
circuits that are constructed with nanotechnologies. In nanotechnologies,
diodes are widely used to construct logic functions. To be able to get the
correct functionality of the circuit, we need diodes. I believe that
integrating diodes in IRSIM may be important in the future.

For the diode, an ideal model would be enough for our use. Say, it will
conduct current if voltage exceeds 0.5V, otherwise it will not conduct. We
can put resistance after the diode to model the resistance of the diode.

In your previous email, you mentioned that "It would be reasonably easy to
stick some diode models into the simulator". If you can give me hints about
how to do this, I am willing to try and see if the simulator will work. 

Thank you very much.

Sincerely,

Muzaffer Simsir
PhD Candidate
Department Of Electrical Engineering
Princeton University
Olden Street
Princeton, NJ, 08544
Office: +1 (609) 258 1354


-----Original Message-----
From: R. Timothy Edwards [mailto:tim.edwards at multigig.com] 
Sent: Sunday, May 07, 2006 1:46 PM
To: Muzaffer Simsir
Cc: magic-dev at csl.cornell.edu
Subject: Re: Diodes -- IRSIM representation

Dear Muzaffer,

> I have a question. Is there any way to include diodes or any other 
> one-way transmitting circuit elements into IRSIM .sim files?

For what purpose?  I've put "extra" devices into the .sim format as handled
by netgen so I could do LVS on layouts.  Simulation is another matter.  I
don't know enough about how the switch and linear simulation models work.
It would be reasonably easy to stick some diode models into the simulator;
what I can't say is whether or not evaluating them would immediately lock up
the simulator.

					Regards,
					Tim

+--------------------------------+-------------------------------------+
| Dr. R. Timothy Edwards (Tim)   | email: tim.edwards at multigig.com     |
| MultiGiG, Inc.                 | web:   http://www.multigig.com      |
| 100 Enterprise Way, Suite A-3  | phone: (831) 621-3283               |
| Scotts Valley, CA 95066        | cell:  (240) 401-0616               |
+--------------------------------+-------------------------------------+