Hello everyone does anyone know how to plot gm in ...
# ieee-sscs-dc-23h
Hamza Sadiq
07/05/2023, 3:52 PMHello everyone does anyone know how to plot gm in xschem?
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Boris Murmann
07/05/2023, 4:00 PMYou can add a control statement that will add the desired gm to the output file, e.g.:
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save all @m.x1.m0[gm]g
Gabriel Maranhão
07/05/2023, 6:22 PMA mensagem tem elementos interativos.
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Boris Murmann
07/05/2023, 8:29 PMMy example is for a transistor that is instantiated as x1 in the netlist. What does your instantiation in the netlist look like?
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Gabriel Maranhão
07/05/2023, 9:32 PMOh it worked, my transistor is instantiated as xm1
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XM1 net2 net3 net4 net1 nfet_03v3 L=0.28u W=0.22u nf=1 ad='int((nf+1)/2) * W/nf * 0.18u' as='int((nf+2)/2) * W/nf * 0.18u'👍 1
Gabriel Maranhão
07/05/2023, 11:25 PMI have one more question, how do I include in the ".raw " file, the value of deriv(i(vd)).
I tried some some ways, but none appears as an variable options at the gaw wave viewer. I know how to do on ngspice, but not using xschem+gaw.
I tried:
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.dc VG 0 3.3 1m
.control
save all dID=par('deriv(i(vd)')
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.dc VG 0 3.3 1m
.save all dID=par('deriv(i(vd)') Copy code
.dc VG 0 3.3 1m
.save all deriv(i(vd)b
Boris Murmann
07/06/2023, 12:31 AMWhat do you mean when you say you got it working with ngspice? Xschem just produces a netlist and can't have much to do with the issue. This link gives you some alternatives to try: https://sourceforge.net/p/ngspice/discussion/133842/thread/8aff6885/
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Gabriel Maranhão
07/07/2023, 6:43 PMI got working on ngspice by using
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wrdata my_output_file.txt deriv(i(vd)2 Views