transistor introduction
Transistor (transistor) is a solid semiconductor device (including diodes, triodes, field effect transistors, thyristors, etc., sometimes especially bipolar devices), with multiple functions of detection, rectification, amplification, switching, voltage stabilization, signal modulation, etc. As a variable current switch, the transistor can control the output current based on the input voltage. Unlike ordinary mechanical switches (such as Relay, switch), transistors use electrical signals to control their own opening and closing, so the switching speed can be very fast, and the switching speed in the laboratory can reach more than 100GHz.