At 08:36 AM 8/26/2009, you wrote:
> Thanks Steve, that solves most of the problems. However, one more
>remains. The instantiation is correct and the subckt definition is
>correct; but the device on which I want the parameter to inherit has a
>hard coded value of 0u. Jake observed this in earlier versions of
>Electric; but was not able to solve this problem. See below:
>
>*** CELL: inv_33{sch}
>.SUBCKT inv_33 in out vdd wn=1u wp=1.5u
>** GLOBAL gnd
>** GLOBAL vdd
>Mmn0 out in gnd gnd nsvt33 L=0.4U W=0U
>Mmp0 vdd in out vdd psvt33 L=0.4U W=0U
>.ENDS inv_33
>
>I would like to have:
>
>*** CELL: inv_33{sch}
>.SUBCKT inv_33 in out vdd wn=1u wp=1.5u
>** GLOBAL gnd
>** GLOBAL vdd
>Mmn0 out in gnd gnd nsvt33 L=0.4U W={wn}
>Mmp0 vdd in out vdd psvt33 L=0.4U W={wp}
>.ENDS inv_33
In the "inv_33" cell, the transistors have their width set to "@wn"
or "@wp" which are of type "Java". If you change the type to be
"Spice" then they still interpret correctly in Electric (i.e. the
values are shown when you are in the cell) but Spice knows to emit
'wn' and 'wp' instead of actual numbers. However, it wraps them in
single-quotes, not curly-braces. Is this acceptable to Spice? If
not, I need to understand which version of Spice you are using and
which versions use which types of parameters.
-Steve
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