Switching diodes are a type of semiconductor diode that is specially designed and manufactured for "on" and "off" on the circuit. So what is the working principle of the switching diode? Here we introduce.

Lu Jing switching diode from the turn-off or turn-off into the turn-off time than the average diode, with switching speed, small size, long life, high reliability, widely used in electronic equipment switching circuit , Detection circuit, high frequency and pulse rectifier circuit and automatic control circuit.

Switching diode from the cut-off (high impedance state) to the conduction (low impedance state) is called the open time; from the conduction to the cut-off time is called the reverse recovery time; the sum of these two divisions is called the switching time. The general reverse recovery time is greater than the turn-on time, so only the reverse recovery time is given on the operating parameters of the switching diode.

Semiconductor diode conduction equivalent to the switch is closed (circuit connected), the equivalent of the switch is turned off (circuit off), so the diode can be used for switching, commonly used models 1N4148. Due to the uni-directional conductivity of the semiconductor diode, the pn junction is conducting at positive bias and the resistance in the on state is small, about several tens to several hundreds of ohms. Under the reverse bias, the pn junction is in the off state , The resistance is very large, the general silicon diode in more than 10mω, germanium tube also has tens of thousands of Europe to hundreds of thousands of Europe. Using this feature, the diode will act as a control current on or off in the circuit, making it an ideal electronic switch.

The above is the working principle of the switching diode, Lu Jing semiconductor small signal switching diode complete parameters, many models to meet various needs, if necessary, contact customer service to understand the relevant parameters after the purchase.