What Is A Capacitor

Two conductors close to each other, sandwiched with a non-conductive insulating medium, which constitutes a capacitor. When a voltage is added between the two plates of a capacitor, the capacitor stores charge. The capacitance of a capacitor is numerically equal to the ratio of the amount of charge on one electrode plate to the voltage between the two plates. The basic unit of capacitance of a capacitor is farad (F). In circuit diagrams, capacitive elements are usually denoted by the letter C.

Capacitors play an important role in tuning, bypassing, coupling, filtering, and other circuits. It is used in the tuning circuit of the transistor radio, and it is also used in the coupling circuit and bypass circuit of the color TV.

With the rapid development of electronic information technology, the replacement of digital electronic products is getting faster and faster, and the production and sales of consumer electronic products based on flat-screen TVs (LCD and PDP), notebook computers, digital cameras and other products continue to grow, driving the growth of the capacitor industry.