March 2006
Intermediate to advanced
960 pages
25h 28m
English
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6
Physical Phenomenon in JFET and MOSFET
6.1 Introduction
So far we have discussed the functioning of the BJT. The carriers in BJT have to cross the junction(s) under the influence of externally applied bias that results into the current flow. In contrast to the BJT, the carriers in unipolar devices (FET) do not cross the junction, rather they flow through only one type of semiconductor (either n or p), called the channel. The channel thickness is controlled by the external electric field that in turn controls the flow of carriers. Thus, the Field Effect Transistor (FET) is a device wherein, the flow of charge carriers between drain and source is under the control of externally applied electric field. The externally applied electric field penetrates ...
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