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Given: Vtn = 0.4V enter image description here

NMOS1
Vgs = Vg - Vs = 1.9V
Vgd = Vg - Vd = -0.6V
Vgd < Vtn and Vgs > Vtn
My answer is Saturation Region

NMOS2
Vgs = Vg - Vs = 2.2 - (-2.3) = 4.5V
Vgd = 2.2 - 0.5 = 1.7V
Vgd > Vtn and Vgs > Vtn
My answer is Triode/Linear/Ohmic region

NMOS3
Vgs = 0.9 - (-2.5) = 3.4V
Vgd = 0.9-0.5 = 0.4V
What region is the NMOS operating in if Vgd is equal to Vtn?

I have attempted to answer 1 and 2 as highlighted above but am unsure. As for number 3, my book only has cases for Vgd>Vtn and Vgd

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  • \$\begingroup\$ Welcome to the site. Unfortunately for you, this is not a free design house, homework-writing service or an on-line technical encyclopedia, copied out to you on demand. People will help you take the next step if your questions shows that you've done as much as you possibly could on your own - which your post doesn't, I'm afraid. Please either revise your question showing your work and findings so far or delete it if you find Internet searches give you your answer anyway. Again, welcome. \$\endgroup\$ – TonyM Apr 12 '17 at 8:22
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    \$\begingroup\$ @TonyM I already answered 1 and 2, and would just like to know if I did it right. As for number 3, my book only has cases for Vgd>Vtn and Vgd<Vtn, not if Vgd=Vtn \$\endgroup\$ – John D Apr 12 '17 at 8:26
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    \$\begingroup\$ My mistake: I should have written "this is not a homework-checking service". VTC. \$\endgroup\$ – TonyM Apr 12 '17 at 8:29
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    \$\begingroup\$ We are not here to do your homework for you. \$\endgroup\$ – Olin Lathrop Apr 13 '17 at 12:49
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    \$\begingroup\$ I'm confused. Aren't we only closing homework question with no attempted solution? \$\endgroup\$ – Dmitry Grigoryev Apr 13 '17 at 13:02