EC > GATE 2018 > MOSFET Amplifiers
Two identical nMOS transistors M1 and M2 are connected as shown below. The circuit is used as an amplifier with the input connected between G and S terminals and the output taken between D and S terminals. Vbias and VD are so adjusted that both transistors are in saturation. The transconductance of this combination is defined as gm=∂iD/∂vGS where iD is the current flowing into the drain of M2. while the output resistance is ro=∂vDS/∂iD, Let gm1, gm2 be the transconductances and ro1, ro2 be the output resistances of transistors M1 and M2, respectively.
Which of the following statements about estimates for gm and ro is correct?
Correct : c
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