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what i remember is that, they do have a little difference
for DC. as in dc s-parameter has no meaning, they defined it differently. the result is for a short circuit in HFSS, it become open circuit in ADS or the other way.
hfss diode simulation
you can not simulate active device by HFSS or other EM tool, they are base on Maxwell equations only. diode is a active device, which is base on quantum physics.
cadence+noise transient
please just check the cadence spectre RF manual, in which there are very detailed description and examples. from there you can find much better explaination and step-by-step proceduures than all the answers here.
it could be because:
at the cascoded node, you reduce the milled effect cap for the input. but at the same time you isolate the feedback resistor with that node. it means the output resistance is increase to (gm//gds).
i am assuming the feedback resistor is much less than gm//gds.. then the...
Hi,
did you try to increase the simulation accuracy? this might help..
also when you increas the groudring which is in series with your inductor, apparently it will increase the inductance.. try to use large metal not just a thin trace as the ground ring.
ads momentum hotfix
Hi,
if you are using ADS2004A, you probably need a hotfix..
it can be be downloaded from agilent technical support website.
or it could be that the problem size is too large..
I had the same problem whem comparing momentum and HFSS, but i find got it fixed..
it is simple:
increase the simulation accuracy by decreasing the maximum delta S from 0.01 to 0.005.
Good Luck
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