Do you understand the characteristics of switching diodes

Do you understand the characteristics of switching diodes

Due to the unidirectional conductivity of semiconductor diodes, the PN junction conducts under positive bias, and the resistance in the conduction state is very small, about tens to hundreds of ohms; Under reverse bias voltage, it is in a cut-off state, with a high resistance. Generally, silicon diodes are above 10M Ω, and germanium s can also range from tens of kiloohms to hundreds of kiloohms. By utilizing this characteristic, a diode will play a role in controlling the current on or off in the circuit, making it an ideal electronic switch.

switching diodes are a type of diode specially designed and manufactured for "on" and "off" on a circuit. The time from the cut-off (high resistance state) to the conduction (low resistance state) of the switching diode is called the turning on time; The time from conduction to cut-off is called the reverse recovery time; The sum of two hours is called the switching time. Generally, the reverse recovery time is greater than the opening time, so only the reverse recovery time is given in the usage parameters of the switching diode. The switching speed of switching diodes is quite fast, like the reverse recovery time of silicon switching diodes, which is only a few nanoseconds, and even germanium switching diodes, which are only a few hundred nanoseconds.

switching diodes have the characteristics of fast switching speed, small size, long service life, and high reliability, and are widely used in switching circuits, detection circuits, high-frequency and pulse rectification circuits, and automatic control circuits of electronic equipment.