Hi all,

I am presently working with spectre in the Command line interface. I am able to write my modules (ahdl.def codes) for various components, subcircuits and netlists and I am able to access them from the Command line interface in UNIX environment.

I would like to access my modules in the analog circuit design environment (schematic interface). I created a symbol view for my modules. But I am unable to create verilog views or other views by which I can access them as instances in my circuit.

Can anyone help me?

-Sheela

Hi Andrew,

Thank you very much for your reply.

I am writing circuit models for ESD application. As the available models do not address this region.
Presently I have a module written for ggNMOSt.
As I had mentioned before, I am able to run them from the command line interface and look at my results.

But this model is to be used just as an instance in a larger circuit. If I need to write the netlist by myself everytime, I tend to make mistakes. So I wish to use the schematic interface. And I want to vary the parameters of this instance, just like how we can change the parameters for the built in models when we click on "property".

So the question is how to address (access) the user written module from the instance and property menu in the schematic view or rather how to include them in the list of libraries available (under instance) and use them in the circuit.

I wrote the ahdl code by using the examples in the (ahdl.def) ahdl.lib files. Do I have to write veriologa files also?  When I see any instance in the ahdl.lib from the library manager, then they are almost always associated with three views, namely ahdl, veriloga and symbol.

Is my question clearer now?
eagerly awaiting your reply,
-Sheela

Sheela,

Try typing:

editor

in the CIW - it should be the name of some editor. You can set it to the editor of your choice by doing (say):

editor="nedit".

Now, it sounds from the fact that you're referring to ahdl.def that your code may be spectreHDL, not Verilog-A?

When you create the view, using File->New->CellView,
you can choose one of two tools:

SpectreHDL-Editor
Verilog-A-Editor

The viewName can be whatever you want, but people commonly use "ahdl" for SpectreHDL and "veriloga" for Verilog-A (that's what you've seen in ahdlLib). You don't need to write both spectreHDL and verilog-a, one would be sufficient (if you're running spectre). However, I'd recommend that if you're going to choose one, choose verilog-a, since that's the standard, and if you're going to use AMS Designer, spectreHDL is not supported there...

The fact that you're getting a licensing error suggests that the licenses aren't set up properly for that session. Try typing:

lic_error -24

and this will give you lots of details as how to figure out why the licenses can't be found. It will be trying to check the licenses in various parts of the tools, hence the error.

Regards,

Andrew.

Hi Andrew,

Finally I succeeded in adding my module in the chematic library. Now I see that the CDF parameters are getting added to it automatically.  

Thank you very much for your help.

I have another question and this is regarding subscircuit.   I have a subcircuit, which calls other user-defined modules. How can I call my subcircuit as an instance?
And where will I have to specify the path to the modules used in this subcircuit?

Eagerly awaiting your reply,
Sheela