Depletion Mode of D-MOSFET

This figure shows the N-channel depletion mode of operation of D-MOSFET.Where the gate terminal is negative potential ,electrons are gather on the gate terminal and protons are gather on the N-type conducting channel (i.e electrons is empty on the N-type conducting channel or depleted) but there are some little free electrons which are responsible for current conduction via N-type conducting channel of D-MOSFET.According to the values of the negative potential on the gate terminal,the resistance of the N-type conducting channel of the D-MOSFET is increase. Consequently ,lesser amount of the free electrons are responsible for the lesser amount current from source terminal to the drain terminal through the N-type conducting channel.From the above discussion, we know that the amount of the current flow from the source terminal to the drain terminal through the N-type conducting channel of the D-MOSFET is controlled by the changing the negative potential on the gate terminal .So the operation is depends on the depleting the N-type conducting channel of free electrons .The negative potential on the gate terminal ,the operation is known as depletion mode of operation of the D-MOSFET.