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Modeling >> Semiconductor Devices >> FET intrinsic gain characterisation
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Message started by zulqar on Dec 5th, 2015, 1:40pm

Title: FET intrinsic gain characterisation
Post by zulqar on Dec 5th, 2015, 1:40pm

Hi everyone,

I am characterizing a Field effect transistor with a verilog A model using spectre. I want to plot gmro (intrinsic gain) vs vds. But the problem is that, the model does not store gm or gds values in dc operating points. Is there any test bench from which I can extract gmro vs vds plot without actually getting gm and gds values individually?
Any suggestion is appreciated.

Thanks!!!

Title: Re: FET intrinsic gain characterisation
Post by Geoffrey_Coram on Jan 5th, 2016, 6:30am

If you have the verilog-a code, you could add those operating point values.

Title: Re: FET intrinsic gain characterisation
Post by Ken Kundert on Jan 5th, 2016, 10:34pm

Do you mean gmro? You can use two AC analyses, one to measure gm, the other to measure ro.

-Ken

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