transistor mosfet

A transistor is a solid semiconductor device that can be used for detection, rectification, amplification, switching, voltage regulation, signal modulation, and many other functions. Transistor as a variable switch, based on the input voltage, control the outgoing current, so the transistor can be used as a current switch, and the general mechanical switch (such as Relay, switch) is different in that the transistor is controlled by the use of telecommunications, and the switching speed can be very fast, and the switching speed in the laboratory can reach more than 100GHz.