fT calculations from S-parameters - RF Cafe Forums

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Jeanalmira
Post subject: fT calculations from S-parameters
Unread postPosted: Wed Apr 27, 2005 9:33 pm
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Joined: Tue Mar 15, 2005 11:43 pm
Posts: 65
Location: Singapore
Hi All :

I have a doubt whether is it possible to calculate or derive fT (cut-off frequency) of transistors, particularly FET, from measured small signal S-parameters?

I understand that fT derivations/ calculations is very much dependent on nonlinear characteristics of the device. While Small signal parameters mostly treated as linear parameters.

Therefore, I am not sure whether there's a way to derive/ calculate fT of transistors from measured small signal S-parameters?

:?:

Thank you in advanced for your advice. :-)

Best Regards,
Jean

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Unread postPosted: Thu Apr 28, 2005 12:35 am

I don't think that it is possible to calculate fT from S-Parameters data. This parameter is ususally specified in the data sheet of the device.

Posted 11/12/2012