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Path: utzoo!watmath!clyde!floyd!harpo!decvax!mcnc!rti!will
From: will@rti.UUCP
Newsgroups: net.lsi
Subject: we need an updated esim
Message-ID: <1153@rti.UUCP>
Date: Mon, 19-Mar-84 15:47:28 EST
Article-I.D.: rti.1153
Posted: Mon Mar 19 15:47:28 1984
Date-Received: Tue, 20-Mar-84 05:59:58 EST
Lines: 39

I'm EXTREMELY sorry to have posted this to a non-existent newsgroup, but I swear
'net.vlsi' was listed in our ngfile. Anyway, here goes again (in the right
newsgroup this time (I hope)).

Here at RTI, we do a lot of circuit extraction and simulation of CIF format
files using the Berkeley CAD tool software (caesar, mextra, esim, and the
like). We've run into a problem with esim: it doesn't simulate this three-
transistor XNOR gate correctly in all cases. This is the circuit:

                                       o Vdd
                                       |
                                    ----
                              ----| |   n-depletion
                              |     ----
                              |--------O--------------- output
                                       |
   input   ----o------   --------------|-------------   -----o----  input 2
     1         |     |___|                          |___|    |
               |      ---                            ---     |
               |       |                              |      |
               |       |______________________________|______|
               |______________________________________|

                  n-enhancement                  n-enhancement

It's an NMOS gate that has a Vdd connection, but no ground connection.
We've been using the 1980 version of esim. What I'd like to know is

	Is there an updated version of "esim" that can handle this
	gate, and can we get a copy?

	Is there any other public-domain or reasonably-priced
	piece of software out there that can do circuit simulation
	using the output of the "mextra" circuit extraction program?

Thanks in advance for any and all answers. I'm getting a bit desperate!

					William Gwaltney Jr.
					decvax!mcnc!rti!will