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I am trying to calculate the value of the capacitance looking into the drain of the transistor using Y11 parameters( imaginary part). The problem I am getting is " I get a resonant peak" . I do not understand why? Can anyone help me with the explanation? The circuit that I am using is a nfet_rf transistor with 870um width with an inductor of 10nH at the drain with Vdd=1.5V and at the gate Vpulse from 0 to 1.5V at 2.4Ghz.
Thank you in advance.
H Grad Student,
Why are you using psp, rather than sp analysis?
Sr. Staff Support AE, Global Customer Support
Cadence Design Systems, Inc.
In reply to Tawna:
Because , I want to look at the average capcitance for one period( 0-1.5 V at the input, large signal) at 2.4Ghz. Other thing is that it is quick, I just have to divide the Yii(imaginary ) by 2*pi*f to gett he value for C.
I should get a linear curve w.r.t frequency but instead I am getting a resonance?
In reply to Grad Student:
You may want to file a Service Request with Customer Support.
It’s difficult to say without having a testcase/more information.