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Distinguish between enhancement mode and depletion mode metal oxide semiconductor field effect transistors giving their characteristics.
Ans.
Enhancement mode and depletion mode metal oxide semiconductor field effect transistors
E Mode MOSFET
Depletion Mode MOSFET
a. No channel exists in between rain and
source at VGS = 0
a. Channel exists at VGS = 0 [in fabrication n type impurity is diffused
in between two n+ regions
b. Threshold voltage is positive for
nMOS Device.
b. Threshold voltage is negative for
c. No current flows for negative VGS
[nMOS]
c. Current flows even for negative VGS
Diagram of Enhancement mode and depletion mode metal oxide semiconductor field effect transistors
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