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How to get the S parameters of a MOS transistor in HSPICE?

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mazelk

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Scattering parameters...

Hi

How can I get the scattering parameters of a MOS transistor, working at high frequencies (above 3GHz) ???.

Is this usefull??

How can I analyse with HSPICE??
 

Re: Scattering parameters...

The transistor models in all SPICE type programs are not accurate at these higher frequencies. You will have to either measure the physical transistor or get the data sheet. The reason for the inaccuracy is that they use lumped element equivalent circuits to cover the whole frequency range. The JFET spice model is so bad that it predicts x-ray frequency amplification.
 

Re: Scattering parameters...

If you can not find S-Params because most foundaries sometimes do not give them all the times except when transistors are employed in RFIC's, Amplifiers, Mixer etc. This is a sad fact.

Even in this case these parameters then can be entered as whole in what is the design itself.

For transistors sometimes , watch out: they give always: VBIC, Gummel-Poon, and BSIM3 and BSIM4, TOM3 models.

Check to find these. These in most of the cases are in datasheets. They are ok to substitute S-Parameters.

djalli
 

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