[SI-LIST] : The correct way to short tow nodes in SPICE is?

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From: Bo (bo_pfc@yahoo.com)
Date: Fri Oct 20 2000 - 08:11:58 PDT


Hi
I would like to discuss one of the big SPICE myths. I have used several
different spice programs (PSPICE, HSPICE, etc) and I have seen two different
implementations. The problem is that nobody can agree which is the better
implementation of the two. I would like to hear your opinion on this.
The two implementations are:

1) Connect two nodes to each other by putting 0 Ohm resistor.
2) Connect two nodes to each other by putting 0 volt DC source between them.
  
Method 1 typically results in resistance set to some small value other than 0
(by default HSPICE will set it to 1e-5; this can be changed in Hspice). I have
trying to convince people using this method to at least put several of
resistors in parallel(just in case someone changed default values; in HSPICE
this is easily done my setting multipler M to some high value).

What is your opinion on this?

Regards,
Bo

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