The transistor is the one device most responsible for the advances in the field of electronics. Due to its small size, high efficiency and low cost, it has replaced the vacuum tube in most applications. Many of the items we take for granted today, such as pocket radios, high speed computers, communication satelites, etc would not be possible without the transistor.
Transistors, like semiconductor diodes, are made of silicon or germanium material. As in a semiconductor diode, the silicon or...