ROHM Transistors
Transistors are parts that are made from semiconductors and control the current. They are used to amplify small signals, or as electrical circuit parts for controlling the on/off of current. Transistors have three metal protrusions called an emitter, collector and base. Symbols and numbers indicating the structure, application and product number of the corresponding manufacturer are on the surface of the base section of the metal protrusions. The internal structure is comprised of a P-type semiconductor with a positive charge adhered to an N-type semiconductor with a negative charge. Transistor properties vary according to the semiconductor structure and combinations. Typical types are bipolar transistors that extract voltage changes with current changes, and unipolar transistors that extract current changes with voltage changes.