Re: new AMS LRM 2.2 draft c - parameter descriptions

edaorg@v-ms.com wrote:
>
> I agree that if you have 400 different descriptions you'll want to minimize
> your typing, the template approach does that - assuming a bunch of them will
> be using "ohms" it would be something like -
>
> parameter Ohms#("Resistance") from [0:inf);
>
> which is less typing than -
>
> parameter real "Ohms" from [0:inf) --- "Resistance";
 
While several parameters might have the same units (RD, RS are ohms),
none of them will have the same description; it would be very little
help to the user if the "drain resistance" and "source resistance"
were given the exact same description.

There are also probably a good 40 different units used in BSIM3,
if you consider some are straight values, some are per unit width,
some are per unit area, and some even have fractional units because
they're part of a pow() expression. I don't think it's reasonable
to make the user `define 40 different expressions that will be
(a) unique and (b) easy to understand as you read through the
source code.

> Then you can do -
> `define OHMS (*units="Ohms"*)
> `define RES (*description="Resistance"*)
> ...
> parameter real `OHMS `RES from [0:inf);

No, you can't; you have to do
  `OHMS (*desc="drain resistance"*) parameter real rd from [0:inf);
because attributes have to go first on the line.

-Geoffrey
Received on Thu May 27 06:35:08 2004