plot quality factor and capacitance vs freuqncy curves in cadence spectre

[singhji0000]

Hello

I am working on LC VCO.I am using cadence 0.18 um and I tried to simulate the vermis_18f component (varactor) in 0.18 um in cadence spectre. i have done connections using port 1 connected to one side (assuming it as gate) and port to the other pin of the component with body also shorted to this pin ( i suppose that body=source= drain are connected). am i correctly doing this?

i was able to plot waveforms for Z11 parameter real part and imaginary part.

1) As Q= Im(Z)/Re(Z) ,but i am not able to plot it as waveform using calculator.Please help me regading this

2) Also how to plot c-vgs curve in spectre??

Thanks in advance

manjeet

 

[pancho_hideboo]

See the followings.
The Designer's Guide Community Forum - Simulation Setup for Varactor C-V and Q-freq curve
The Designer's Guide Community Forum - Inductance extraction: L reduce with frequency?
The Designer's Guide Community Forum - Cgs of MOS in Spectre