<@U018FPT87NG> In some designs i did in the past verilog-A blocks were used. Some simulators just re...

Stefan Schippers

07/03/2021, 5:57 AM

@User In some designs i did in the past verilog-A blocks were used. Some simulators just require the verilog-A instance to be netlisted like a spice subcircuit call, then you provide the path of the compiled model to the simulator. I have done this with HSPICE. I have not done these tests on ngspice. So if you need Verilog-A with ngspice send me a test case, i mean the interface (i/o ports) and the verilog-A code of the block and i will do the tests.

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Sahil Shah

07/03/2021, 9:35 PM

Thanks. I tried it out with a verilog A code and a simple RC circuit. But I am not too sure where to include the verilog-A file. Is this a good place to upload the xschem schematic and verilog-A model?

Sahil Shah

07/03/2021, 9:36 PM

Verilog_A.zip

Sahil Shah

07/03/2021, 9:36 PM

This has both verilog A file and xschem schematic.

Stefan Schippers

07/04/2021, 6:04 AM

Ok, thanks , will take a look at this...

Stefan Schippers

07/04/2021, 6:22 AM

@Sahil Shah In order to use Verilog-A with ngspice you must compile ngspice with adms support, then use AdmsXml to convert a verilog-A model to C code. I have never done the Verilog-A --> C compiling and i have not installed AdmsXml. Please read Chapter 13 of ngspice manual. I think using verilog-A with ngspice is not that straightforward, you probably need to rebuild ngspice with the C-code of the new model. Not feasible for a generic user wishing to simulate his circuit.

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Sahil Shah

07/04/2021, 1:06 PM

Hmm interesting. Let me try this out. I was having issues before while installing it with AdmsXml. But let me try it out. Thanks for the help

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