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Patch diode, also known as crystal diode, referred to as diode , there are early vacuum electronic diodes; it is a kind of electronic device with unidirectional conduction current. Inside the semiconductor diode, there is a PN junction and two lead terminals. This kind of electronic device has the conductivity of unidirectional current according to the direction of applied voltage. Generally speaking, the patch crystal diode is a pmurn junction interface composed of p-type semiconductors and n-type semiconductors. A space charge layer is formed on both sides of the interface to form a self-built electric field. When the applied voltage is equal to 00:00, the dispersed current and the drift current caused by the self-built electric field are in electrical equilibrium because the carrier concentration difference on both sides of the pmurn junction is equal to the drift current caused by the self-built electric field. This is also the normal characteristic of the diode.
Chip diode tube voltage drop: Silicon diode (non-light-emitting type) forward tube voltage drop 0.7V, germanium tube forward tube voltage drop to 0.3V, LED forward tube voltage drop will vary with different light-emitting colors. There are three main colors, and the detailed voltage drop reference values are as follows: the voltage drop of the red LED is 2.0murmur2.2V, the voltage drop of the yellow LED is 1.8V-2.0V, the voltage drop of the green LED is 3.0V-3.2V, and the rated current during normal light emitting is about 20mA. The voltage and current of the patch diodes are not linear, so it is necessary to connect the corresponding resistors when the different patch diodes are connected in parallel. Chip diode characteristics next to the chip diode, electronic components, a device with two electrodes that only allows current to flow in a single direction. Many uses use its rectification function. The varactor (Varicap Diode) is used as an electronic adjustable capacitor.
貼片二極管的管壓降:硅二極管(不發光類型)正向管壓降0.7V，鍺管正向管壓降為0.3V，發光二極管正向管壓降會隨不一樣發光色彩而不一樣。主要有三種色彩，詳細壓降參考值如下:赤色發光二極管的壓降為2.0--2.2V，黃色發光二極管的壓降為1.8-2.0V，綠色發光二極管的壓降為3.0-3.2V，正常發光時的額定電流約為20mA。貼片二極管的電壓與電流不是線性關系，所以在將不一樣的貼片二極管并聯的時候要接相適應的電阻。 貼片二極管特性 貼片二極管，電子元件旁邊，一種具有兩個電極的設備，只允許電流由單一方向流過。許多的使用是使用其整流的功用。而變容二極管(Varicap Diode)則用來當作電子式的可調電容器。