I suppose that Rds depends on die temperature, too, so large signal Rds is a thicket, not a value.

On Thu, Dec 19, 2024 at 09:41 PM, <abanindra.kumarmandal.ece24@...> wrote:

But RON is defined for linear region right? 

Even in the FET's linear region, it is nonlinear.  It is unlikely that a JFET or MOSFET has an Rds that is actually linear, in the so-called linear region.  It "bends", even there.

 

But if you found a FET whose Rds was strictly linear, then there would be no difference between small-signal and large-signal Rds.

 

Andy

 

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