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Unformatted text preview: We can see that for an ideal NMOSFET the slope of ID is zero and thus the ro is infinite In the linear regime the smallest ro is 1/0.036 Ω. Saturation ro goes to infinity. Even adding an Ro to the Model does not increase ro in the linear regime. D o D o m V R r R r g A For “Real” MOSFETs Ro in saturation is not fixed for all VGS! Design away effect of Ro, by setting RD<<Ro If RD<<ro, then the larger ro, the larger the common source gain. D A o D o D o m V I V r R r R r g A...
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 Spring '11
 dsfas
 Amplifier, RO, ro RD

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