what is operation of diode
A semiconductor diode, the most common type today, is a crystalline piece of semiconductor material with a pân junction connected to two electrical terminals.A vacuum tube diode has two electrodes, a plate (anode) and a heated cathode. Semiconductor diodes were the first semiconductor electronic devices.he most common function of a diode is to allow an electric current to pass in one direction (called the diode's forward direction), while blocking current in the opposite direction (the reverse direction). Thus, the diode can be viewed as an electronic version of a check valve.