how to estimate the terminal capacitance of a MOS tansister

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frankwen

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as the title
in common souce,the Cgd must mutiplite gain?
how about the Cgs and the Cgb
the DC point prints a Cgg
what does this mean?
thanks
best wishes
 

Re: how to estimate the terminal capacitance of a MOS tansis

frankwen said:
the DC point prints a Cgg what does this mean?
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Don't know the Search function? E.g. see here.
 

Re: how to estimate the terminal capacitance of a MOS tansis


thanks
but when Cgg=Cgd+Cgs+Cgb
how should I consideration the Cgd when the transister works in a common source case
I mean does Miller effect work here?
Cgd=Cgd'*gm*ro?
or Cgd=Cgd'
when Cgd and Cgd' is the capacitance before and after the Miller effect
thanks again
best wishes
 

Re: how to estimate the terminal capacitance of a MOS tansis

frankwen said:
... when the transister works in a common source case, I mean does Miller effect work here?
Click to expand...
Yes!

frankwen said:
Cgd=Cgd'*gm*ro?
Click to expand...
Right!
 

Re: how to estimate the terminal capacitance of a MOS tansis

thank you very much
thanks

 

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