ABSTRACT
This chapter provides some of the more important terms used in electronics. Between the cathode and the anode are one or more open-mesh electrodes, called grids, which can control the electron flow from cathode to anode. The term rectifier is a general one and could, in principle, apply to any device that has the property of allowing current flow in one direction only. Semiconductor diodes have a small leakage current in the non-conducting direction. The current flowing from one semiconductor material to another is modified by the current flowing into, or the voltage applied to, a separate layer of material between them. The current flowing into the gate is negligible, unlike ordinary transistors where it is really the current flow into the base which controls the current flowing from emitter to collector. A semiconductor diode which has the property of emitting light.
