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# Understand the curves of the mosfet

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I am trying to understand the curves of the mosfet, sorry if the doubt is very basic Where the red point is is the saturation zone of the mosfet, therefore the source drain voltage must be 0v because at this point the mosfet is saturated conduction at maximum current, because on the X axis of the graph called Vds marks 10v for the point Red?

transistorsmosfetShareCiteEditFollowFlagasked 44 mins agoMario4755 bronze badges

• 1therefore the source drain voltage must be 0v No, the red dot is at the point where VDSVDS = 10 V, see the X-axis of the graph. The source drain voltage is VDSVDS. Look up when a MOSFET is in saturation, there is an equation which tells you that VDSVDS needs to be larger than a certain value. – Bimpelrekkie 14 mins ago
• Ah, let me see. (1) The green region is the “saturation” region. (2) The yellow region is the “linear”, or “ohmic”, or “triode” region. (3) In the saturation region, the thick horizontal (well, slightly tilting upwards) straight lines (well, OK, curves) represent the points in the region of a particular Vgs value. (4) So for example, the curve that the red dot sits represents the points of Vgs = 2.5V. (5) The vertical lines 0, 5, 10, 15, 20 mean the voltage across Drain and Source, Vds. (6) Now the red dot operating point says this: (a) Vds = 10V, (b) Vgs = 2.5V, Id = approx 16A . – tlfong01 1 min ago    Edit

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