Operation Mode of D-MOSFET

We know that D-MOSFET can be worked in two mode of operation ,one is depletion mode of operation and another is enhancement mode of operation.Form the construction details of the D-MOSFET we can noted that the whole construction of the D-MOSFET behaves as capacitor where gate terminal of the D-MOSFET acts as one plate of this capacitor and the N-type of conducting channel is acts as another plate of this capacitor .The layer of the metallic oxide (generally the silicon dioxide ) of acts as the dielectric of the capacitor.On the basis of the gate terminal potential the D-MOSFET working mode is classified in two working mode of operation i.e negative potential of the gate terminal operation of the D-MOSFET is called depletion mode of operation and the positive potential of the gate terminal operation of the D-MOSFET is called the enhancement mode of operation.