Power-law nature of field-effect transistor experimental characteristics

Abstract

In making experimental measurements of
\nfield-effect transistor static drain characteristics
\nin the pinch-off region, determination
\nof the effective pinch-off voltage is not
\npossible by direct measurement because of
\nthe presence of spurious drain current at and
\nbeyond pinch-off. Further, indirect measurement
\nis hampered by the absence of a theoretical straight-line function from which the pinch-off voltage may be obtained as an intercept or a slope. In this communication
\na power-law relation for the transfer characteristic
\nis assumed, from which values of both the pinch-off voltage and the exponent may be obtained directly from a straight-line plot of experimental quantities.