I am using Elecric-8.11 Here is the extarcted SPICE netlist of the inverter
"inv_1x{lay}" of "muddlib07" library downloaded from
http://www.staticfreesoft.com/productsLibraries.html which is "standard cell
library" of 32-bit MIPS Microprocessor designed by students of Harvey Mudd
College:
*** SPICE deck for cell inv_1x{lay} from library muddlib07
*** Created on Thu Nov 16, 2006 08:36:32
*** Last revised on Wed Apr 25, 2007 18:38:24
*** Written on Mon Mar 08, 2010 23:10:57 by Electric VLSI Design System,
*version 8.11
*** Layout tech: mocmos, foundry MOSIS
*** UC SPICE *** , MIN_RESIST 4.0, MIN_CAPAC 0.1FF
.OPTIONS NOMOD NOPAGE
.options parhier=local
*** Lambda Conversion ***
.opt scale=0.3U
*** TOP LEVEL CELL: inv_1x{lay}
mn...@0 y a gnd gnd N L=2 W=7 AS=67 AD=42.5 +PS=56 PD=27
mp...@0 y a vdd vdd P L=2 W=10 AS=82 AD=42.5 +PS=62 PD=27
.END
It seems that Electric donot uses the standard AS/AD and PS/PD formulas i.e.
AS/AD = W x Length of drain/source and PS/PD = 2(Length of drain/source) +
W. What formulas Electric uses to calculate AS/AD and PS/PD? How is it
possible that AD and PD of PMOS and NMOS are equal while PMOS is larger than
NMOS?
Nauman Ahmed
On Mon, Mar 1, 2010 at 2:40 AM, Steven Rubin <[email protected]>wrote:
>
> I'm using the latest version of Electric which is 8.11. I don't seem
>> to have Help -> Load Built-in libraries-> MIPS cells there anymore
>> (thus I had asked that you post the layout/schematic). It could have
>> been a bug, I'm not sure.
>>
>
> We took the MIPS cells and other libraries out of the Load Built-in
> Libraries area in version 8.09 because some of those libraries (i.e. pads)
> were changing. We decided instead to locate free libraries on the web:
>
> http://www.staticfreesoft.com/productsLibraries.html
>
> -Steven Rubin
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