Area MOSFET for Power amplifier

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Andriy7

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Hello !

I am trying to design a power amplifier, I have a initial design aproach equations but this are for BJT, I am using mosfet and my doubt is for calculate the number of fingers I found these equation M=Idc/(Jemax*Ae device) (this equation is for bjt because is using Area of emitter) my question is what will be the equivalent for mosfet to area emitter device? W*L? W*Ldrain? W*Lsource?

Thanks :smile:

Best Regards
 

This is for MOSFET LNA, but the equations are valid for any power MOSFET:
**broken link removed**
 
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