Basic Information of Capacitors

Two conductors that are close to each other with a non-conductive insulating medium sandwiched between them form a capacitor. A capacitor stores charge when a voltage is applied between its two plates. The capacitance of a capacitor is numerically equal to the ratio of the amount of charge on one conducting plate to the voltage between the two plates. The basic unit of capacitance of a capacitor is the farad (F). Capacitive elements are usually represented by the letter C in circuit diagrams.

Capacitors play an important role in tuning, bypassing, coupling, filtering and other circuits. It is used in the tuning circuit of transistor radios, as well as in the coupling circuits and bypass circuits of color TVs.

With the rapid development of electronic information technology, the replacement speed of digital electronic products is getting faster and faster, and the production and sales of consumer electronic products such as flat-panel TVs (LCD and PDP), notebook computers, digital cameras and other products have continued to grow, driving the Capacitor industry growth.