Looking for as specific MOSFET

[corel]

About MOSFET

Is there a mosfet that it enters saturation,then as Vds increasing(while keep Vgs constant),its current almostly keeps constant, but suddenly goes down at a certain Vds.After that the current increase slowly,but until another certain Vds,the current increases sharply.Why the current "goes down" happens?

 

[ee484]

Re: About MOSFET

I am not sure I understood your question...

but, while Vgs is constant, you increase Vds.
At the beginning, a MOS is in deep triode mode.
Later, it is biased in triod (linear) region until Vgs-Vth = Vds.
After then, the MOS is biased in saturation.

Slow increase is due to channel length modulation.