Depletion MOSFET
Depletion MOSFET may be fabricated from
the basic MOSFET structure. An n-type channel is obtained by diffusion between
N+ type source and drain in an n-channel MOSFET. The below figure
shows the structure of depletion MOSFET.
n-channel Depletion MOSFET
Working of Depletion MOSFET
When the gate source voltage is zero
considerable drain current flows. When the gate is applied with negative
voltage. Positive charges are induced in the n-channel through the Si O2 layer
of the gate capacitor. The conduction in n-channel FET is due to electrons i.e.
the majority carriers.