A diode is a electrical device enabling currentto maneuver through it in one direction with far greater ease than at the other. The most usual sort of diode in contemporary circuit layout is the semiconductor diode, although some other diode engineering exist. Semiconductor diodes are symbolized in schematic diagrams such as the figure beneath. The expression”diode” is customarily reserved for small signal apparatus, I ≤ 1 . The expression rectifier can be utilized for power apparatus, I > 1 A.