Re: multiple elements in parallel

[Steven Rubin]

At 01:25 AM 9/27/2006, you wrote:
>  I am working on a bandgap reference circuit as a test case using 
> Electric schematic and net listing. I have some questions occuring 
> in a real design environment.
>
> 1. How can I change the model name of a component? For example, NMOS 
> has 'N' as model name when netlisted. I would like to have 'nch' 
> instead. (The spice model file has 'nch' as a name and I would not 
> like to modify it. And I would not like to change netlist file all the time.)

There is no way to change the actual NMOS transistor component to 
emit a different letter.  However, you can create your own spice 
primitive and instruct it to emit any sequence of characters.  See:
      http://www.staticfreesoft.com/jmanual/mchap09-04-04.html

> 2. Is it possible that I have real transistor dimension (like 0.2u 
> or 0.2) instead of multiples of lambdas (1 when lambda is 0.2u) of technology?

By default, Electric uses real dimensions (writing 0.2u).  You can 
disable this in the Spice Preferences by checking "Write Trans Sizes 
in Units" (note that Electric no longer uses the term "lambda", but 
instead calls them "units").

> 3. Is it possible to display the instance name of a component (like 
> MN1, address@hidden) in the schematic?

Every node and arc in Electric has a name.  When first created, they 
are given automatic names such as "address@hidden" which are not 
displayed.  If you change the node or arc's name, then it is 
displayed (and used in Spice).

   -Steven Rubin