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fT calculations from S-parameters - RF Cafe Forums

Because of the high maintenance needed to monitor and filter spammers from the RF Cafe Forums, I decided that it would be best to just archive the pages to make all the good information posted in the past available for review. It is unfortunate that the scumbags of the world ruin an otherwise useful venue for people wanting to exchanged useful ideas and views. It seems that the more formal social media like Facebook pretty much dominate this kind of venue anymore anyway, so if you would like to post something on RF Cafe's Facebook page, please do.

Below are all of the forum threads, including all the responses to the original posts.


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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Post subject:
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.



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