Discussion
What relation does a junction field effect transistor's transfer characteristic follow?
Answer: D
The relation is a square law: the current falls as the square of one minus the ratio of gate voltage to pinch-off voltage. The exponential law belongs to bipolar devices and is why their transconductance is so much larger. Neither linear nor logarithmic describes it. That one family is exponential and the other square-law accounts for nearly every performance difference between them.
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