The thermionic triode, a vacuum tube invented in 1907, enabled amplified radio technology and long-distance telephony. … See more

Because transistors are the key active components in practically all modern electronics, many people consider them one of the 20th century's greatest inventions.
The inventi… See more

A transistor can use a small signal applied between one pair of its terminals to control a much larger signal at another pair of terminals, a property called gain. It can produce a stronger output signal, a voltage or current, … See more

Before transistors were developed, vacuum (electron) tubes (or in the UK "thermionic valves" or just "valves") were the main active components in electronic equipment.
The key advantages that have allowed transistors t… See more

Transistors are categorized by
• Structure: MOSFET (IGFET), BJT, JFET, insulated-gate bipolar transistor (IGBT), other types .
• Semiconductor material (dopants): … See more

Three major identification standards are used for designating transistor devices. In each, the alphanumeric prefix provides clues to the type of the device.
The JEDEC part numbering scheme evolved in the 1960… See more