Describe the difference between the construction and operation of enhancement mode and depletion mode MOSFET.
Enhancement mode and depletion mode MOSFETs differ both in construction and operation. In terms of construction, an enhancement mode MOSFET is normally off at zero gate-to-source voltage (V_GS). For an n-channel enhancement MOSFET, the device is built with a lightly doped p-type substrate with two n+ source and drain regions. The channel between source and drain does not exist naturally; it is induced by applying a _________ ________ ___ _______ __________ ____ ___ _________.
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