Diodes, (English: Diode), an electronic component which planar diode, an apparatus having two electrodes, allowing current to flow only from a single direction over, its application is the use of many of the rectifying function. The varactor (Varicap Diode) is used as an electronic adjustable capacitors. Most current diode possess directionality we usually call "rectifier (Rectifying)" function. The most common feature is the diode allows current from a single direction only through (called forward bias), while the reverse blocking (called reverse bias). Thus, the diode can be thought of as an electronic version of a check valve. Voltage characteristics of semiconductor diode diode anode: the P region leads to the anode electrode. Cathode: electrode lead-out area by N is a cathode. Point-contact diode, the current through a small, small junction capacitance for high frequency circuits and switching circuits. Planar surface contact diode diode price, bear large area planar diode characteristics, current, junction capacitance, suitable for low-frequency rectifier circuit. Planar diode planar diode supply larger junction area by large current for power rectifier, when the junction area is small, can be used as a digital circuit switch. Divided by material germanium, silicon or gallium arsenide; by the structure a little contact, pn junction, pin, Schottky barrier, heterojunction; divided according to the principle of the tunnel, varactor, avalanches and step recovery. Mainly used for detection, mixing, parametric amplification, switching, voltage regulator, rectifier and so on. After the development of optical communication, appear light, optical, avalanche photodiodes, pin optoelectronics, semiconductor laser diodes. Planar planar diode diodes _ _ gold credit provided by the Science and Technology Industrial Co., Ltd. Qingdao integrity. Integrity Technology Co., Ltd. Qingdao (www.qdjcx.com) strong, credible, in Qingdao, Shandong diode industry has accumulated a large number of loyal customers. The company better work attitude and constantly improve the integrity of innovative ideas will lead the gold into the brilliant and you work for a better future!