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How to extract vt and gm max from SPICE

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kelvint

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Hi

Can anyone help me on how to extract threshold (extrapolated using max gm slope) and max gm directly using hspice measure statement ? (the model is a subckt, the parameter LX, LV didn't work).

Thanks!

Kelvin
 

Do you know how to measure these using lab equipment
on physical samples?

Do you have a testbench schematic or netlist which has
implemented these tests' stimuli and loads electrically,
and only needs the .MEASURE syntax?
 

dick_freebird said:
Do you know how to measure these using lab equipment
on physical samples?

Do you have a testbench schematic or netlist which has
implemented these tests' stimuli and loads electrically,
and only needs the .MEASURE syntax?
Click to expand...

The schematic is a simple transistor, I would like to extract device parameters (like idsat, idoff, vt_maxgm method, gm etc.) from hspice simulator (using hspice command). Since I need to repeat it with different device type, size, bias condition, I want to do it under spice in stead of plot the curve and extract the parameters from curve. I know how to use "measure" for idsat, idoff, etc, but I don't know how to do it on vt(from max gm slope), and gm_max.
 

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