61 lines
1.9 KiB
Plaintext
61 lines
1.9 KiB
Plaintext
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A 'quick and dirty' howto for OpenVAF and OSDI:
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Example BSIMBULK
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Tested under MS Windows 10 and OpenSUSE 15.4
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Have OpenVAF compiler available.
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Executables for download are available at https://openvaf.semimod.de/download/
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for Linux and MS Windows.
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Download BSIMBULK model from http://www.bsim.berkeley.edu/models/bsimbulk/
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Open bsimbulk.va in a text editor
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Search for the module name, here:
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module bsimbulk(d, g, s, b, t);
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The module name 'bsimbulk' will become the new model type in the .model statement
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.model mname type ( pname1 = pval1 pname2 = pval2 ... ).
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Compile bsimbulk.va with OpenVAF to obtain bsimbulk.osdi
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Put bsimbulk.osdi into directory bsimbulk/test_osdi_libs
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Search for suitable model parameters
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BSIMBULK107 distro does not contain any parameters
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BSIMBULK106 does contain a model parameter file model.l among the benchmark tests
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Put model.l into directory bsimbulk/Modelcards
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Edit model.l:
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Check if model type is 'bsimbulk' (it is already)
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Choose a model name for mname (nch or pch may be o.k., or BSIMBULK_osdi_N or ...)
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There are NMOS and PMOS parameters in the same file here.
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Create a ngspice netlist in directory bsimbulk, e.g. bb_IDvsVG.cir.
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*** BSIMBULK107 Id versus Vgs ***
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* the voltage sources
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Vd dd 0 50m
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Vg gg 0 1
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Vs ss 0 0
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Vb bb 0 0
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* load the model parameter sets
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.include Modelcards/model.l
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* the call to the transistor (OSDI devices always start with N !)
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NMN1 dd gg ss bb BSIMBULK_osdi_N W=500n L=90n
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* the .control section
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.control
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* load the model dynamically
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pre_osdi test_osdi_libs/bsimbulk.osdi
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* the dc simulation
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dc Vg 0 1.5 0.01 Vb 0 -1.6 -0.4
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* plotting
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set xbrushwidth=3
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plot I(Vs)
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.endc
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.end
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*********************************
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So we have two OSDI specific actions in the netlist:
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load the model by
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pre_osdi test_osdi_libs/bsimbulk.osdi
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instantiate the transistor by
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NMN1 dd gg ss bb BSIMBULK_osdi_N W=500n L=90n
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