SME
Electronics · Problem type
MOSFET regions: cutoff, triode or saturation
Use this for “An n-channel MOSFET with Vₜ = 1 V has VGS = 3 V and VDS = 0.5 V. Which region is it in?”
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Which region is the MOSFET in?
Tap a card, then tap its group.
Above Vₜ a channel forms; once VDS passes VGS − Vₜ it pinches off and the current saturates.
Assumptions
•
Each card is the same n-channel MOSFET, with threshold voltage Vₜ = 1 V.
•
The overdrive is VOV = VGS − Vₜ; the channel pinches off once VDS reaches it.
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