When the short-channel (0.35u), Vth is not constant, it is the function of Vgs. now I want to do Vgs dc scanning, plot Vth vs Vgs graphics, how can I plot this in cadence? I spent a few hours last night,but i did not find Vth. Hspice there is .Probe par ( "vth")
Operation Point Analysis in Cadence can gives u only one value for Vth parameter. U don't able to plot Vth vs Vgs during DC sweep.
Simple way to do it is using Parametric Analysis. U need to set DC OP analysis, output variable e.g. "Vth" == OP("/M1","vth"). Than u can do Parametric Analysis with sweep over Vgs.
U hope u know Cadence enough to do this.
hi
ur method really usefull i think,
but would u please upload a demo for study ?
thank u very much.
Added after 28 minutes:
DenisMark said:
Operation Point Analysis in Cadence can gives u only one value for Vth parameter. U don't able to plot Vth vs Vgs during DC sweep.
Simple way to do it is using Parametric Analysis. U need to set DC OP analysis, output variable e.g. "Vth" == OP("/M1","vth"). Than u can do Parametric Analysis with sweep over Vgs.
U hope u know Cadence enough to do this.
It's only example how to solve given task. But u can extend this example and make a demo and share this experience for EDA Board participiants.
' output variable "Vth" == OP("/M1","vth") '
Use ADE/Outputs/Setup in appeared form fill name: "Vth" and expression e.g. "OP("/M1","vth")"; press ADD button. I think u know this way.