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how to get an estimation of Cds? (Read 449 times)

Tian Microwave Gilligan Posts: 35 Gender:	how to get an estimation of Cds? 03/04/10 at 11:12:09 Say I have the intrinsic model file of a transistor, and I'd like to know the output capacitance value Cds, what is the best way?
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madengr

Microwave Professor

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Re: how to get an estimation of Cds?
Reply #1 - 03/05/10 at 07:05:12

The model file should have Cds as a parameter.

You can use Y-parameters to solve for the unknown values in a network. �See page two:

http://www.ece.unh.edu/courses/ece617/two_port_parameters.pdf

You'll want the Y-parameters at a low frequency where inductive reactance is not too high.

See equation 23 of this:

http://www.icgst.com/con06/aiml06/Final_Articles/P1120625104.pdf

Remember, a handgun is only how you fight your way back to your rifle. - Boston T. Party

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Tian Microwave Gilligan Posts: 35 Gender:	Re: how to get an estimation of Cds? Reply #2 - 05/12/10 at 17:43:43 Thanks. I'll try that.
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