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Electrical properties of Schottky diode

Time:2018-04-17 | Source:JIANGSU YUTAL

How do the Schottky diodes conduct electricity? What kind of characteristics does it have in conducting? If a friend of this knowledge should know, the Schottky diode is a very conductive conductor, and the little editor says today about the electrical properties of the Schottky diode.



 

Single direction conductivity is the most important characteristic of Schottky diode. In the circuit, the current flows from the cathode of the Schottky diode to the cathode. The following is a simple experiment to illustrate the forward and reverse characteristics of Schottky diode.


The positive characteristic is like in the electronic circuit, the positive pole of the Schottky diode is connected to the high potential end, the negative electrode is connected to the low potential end, and the Schottky diode will guide. This connection mode is called forward bias. It must be explained that the Schottky diode is still unable to guide the Schottky diode when the forward voltage at both ends of the Schottky diode is very small, and the forward current passing through the Schottky diode is very weak. Only when the positive voltage is reached to a certain value (this value is called the "threshold voltage", the germanium tube is about 0.2V and the silicon tube is about 0.6V), the Schottky diode can direct direct conduction. The voltage at the two ends of the Schottky diode is basically unchanged (the germanium tube is about 0.3V and the silicon tube is about 0.7V), which is called the "forward pressure drop" of the Schottky diode.


In the electronic circuit, the positive pole of the Schottky diode is connected to the low potential end, and the negative electrode is connected to the high potential end. At this time, there is almost no current in the Schottky diode. At this time, the Schottky diode is in the cut-off state, which is called reverse bias. When the Schottky diode is in reverse bias, there will still be a weak reverse current flowing through the Schottky diode, which is called the leakage current. When the reverse voltage at both ends of the Schottky diode increases to a certain value, the reverse current will increase sharply, and the Schottky diode will lose the single direction conductivity. This state is called the breakdown of the Schottky diode.




  The forward and reverse characteristics of Schottky diode are switched to form the conductivity of Schottky diode. Under this conductive property, Schottky diode makes better use of its own advantages, and achieves the ultimate effect of conducting electricity.