Diodes, (English: Diode), an electronic component which Zener diode, a device having two electrodes glass diodes, 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. Early vacuum electron diode; it is a device capable of unidirectional conduction electron current. In the semiconductor PN junction diode has an internal two lead terminals, such an electronic device in the direction of the applied voltage, with a unidirectional current conductivity. In general, the pn junction interface diode price, crystal diode is formed by a p-type semiconductor and n-type semiconductor sintering. Space charge layer is formed on both sides of the interface of the diode constituting the self field. When the applied voltage is equal to zero, due to the pn junction on both sides of the carrier concentration difference caused by the drift current and diffusion current caused by the self-built electric field equal and in an electrically balanced state, which is under the normal diode characteristics. Diodes _ gold credit (certified) _ diode provided by Integrity Technology Co., Ltd. Qingdao. Integrity Technology Co., Ltd. Qingdao (www.qdjcx.com) is Qingdao, diodes leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Ethical Leadership in gold with the staff warmly welcome all inquiries negotiations to create a better future for gold credit.