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Modeling a on chip capacitor...

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YiLi

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Dear all....

Can any one teach me, or show me some documents, to learn how to extract on chip capacitor model....and also the Q factor ...
(ex, if I have a measured S parameter form on chip capacitor...how can I use this to extract all the equivilent circuits?!)

Thanx!!


YiLi
 

DanTheMan

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Use ADS and introduce your S-parameters along with the circuit model for the capacitor. Simulate over your range of frequencies, and optimize for the two goals:

1) S11_measured - S11_calculated
2) S21_measured - S21_calculated

Of course you have the parameters in your circuit model as variables.

This will match the curves and at that point your capacitance will match the capacitance of the actual measured device.

Note that you might have multiple solutions to your problem since the solution is not uniquely defined.


/Dan
 

YiLi

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Q

um....I know this way to do it as well...
However, I am looking for a physical EXTRACTION....
by transfering the S parameters to Y and Z parameters and then set up the equivilent circuits...

who can show me the whole procedure...?!
and the equivilent circuit?!

Thanx any way...:)
 

okguy

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A method to calculate in 0.35um.
 

YiLi

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Thanx la...

But, one more question...
Do you have this file in 0.25um ?!

We are doing this in 0.25um now...

Thanx.. 8O
 

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