Discussion
Which of the following biasing techniques is NOT commonly used in case of E-MOSFET?
Answer: D
An enhancement type MOSFET conducts only when the gate voltage exceeds the threshold, in the same polarity as the drain. So it needs a gate voltage above threshold, which is supplied by gate bias (a fixed supply), voltage divider bias or drain feedback bias, where the gate is connected to the drain.
Zero bias, where the gate is held at 0 V (as can be done with a JFET or a depletion MOSFET), would leave an E-MOSFET switched off, since \(V_{GS} = 0\) is below the threshold. That is why zero bias is not used with it. The answer is option D.
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