Introduction of  Diode A diode is a two-terminal electrical device, that allows the transfer of current in only one direction. The diode is also known for their unidirectional current property, where the electric current is permitted to flow in one direction.  Basically, a diode is used for rectifying waveforms, within radio detectors or within  power supplies .  They can also be used in various electrical and electronic circuits where ‘one-way’ result of the diode is required.  Most of the diodes are made from semiconductors like Si (silicon), but sometimes, Ge (germanium) is also used. It is sometimes beneficial to summarize the  different types of diodes are existing .  Some of the types may overlap, but the various definitions may benefit to narrow the field down and offer an overview of the different diode types. Types of Diodes There are different types of diodes are available for use in electronics design, namely; a  PIN diode, PN Junction,...