![]() The history of the vacuum tube dates back to 1904 when it was invented by John Ambrose Fleming, an English physicist. The functionality of a vacuum tube is the reason why it is normally referred to as an older version of the transistor. The vacuum is created by a sealed glass which prevents air and other elements from getting into it. It utilizes a vacuum to control and regulate the flow of electric current. What is a vacuum tube?Ī vacuum tube is an active electronic device that is directly installed on the path of a circuit. Your choice will always depend on the application area as some applications will require high-spec transistors while other applications will require lower-spec transistors. ![]() Transistors come in different sizes and have different power specifications. This implies that you will end up with either PNP or NPN transistor configurations.Įach of these layers is connected to terminals named base, emitter, and collector for the case of a bipolar junction transistor (BJT) transistor and source gate and drain for the case of a field effect transistor (FET). ![]() In terms of the construction and arrangement, there are three layers and either the P-type or N-type can be sandwiched. The semiconductor layer of a transistor can have N-type material or P-type material. The history of transistors dates back to 1947 when three Americans Willian Shockley, John Bardeen and Walter Brattain invented the first transistor. They can change the state of the circuits from On to Off and at the same time, they can amplify the current that is getting into the circuit, from low to a higher level. When include in electric circuits, transistors are commonly used for switching and amplification purposes. Differences between transistors and vacuum tubesĪ transistor is a common semiconductor device whose structure comprises of three distinct terminals.
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