Explain behaviour of $g_m$ as a function of below parameters: i) Overdrive voltage with W/L constant. ii) Overdrive voltage with ID constant.

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written 5.9 years ago by

hetalgosavi • 1.7k

modified 4.6 years ago by

prashantsaini • 0

cmos vlsi design

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written 5.9 years ago by

hetalgosavi • 1.7k

MOSFET operating in saturation region produces a current in response to its gate to source overdrive voltage. So we define a parameter which gives this variation. This parameter is called transconductance (gm).

This is the behavior of gm as a function of overdrive voltage with W/L constant. Gm can also be expressed as,

This is the behavior of gm as a function of overdrive voltage with ID constant.

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