FET & BJT both are transistor. We know that there are two types of charge carriers (electron and hole) in a transistor. A bipolar junction transistor (bipolar transistor or BJT) is a type of transistor that uses both electron and hole charge carriers. The field-effect transistor (FET) is a transistor that uses an electric field to control the shape and hence the electrical conductivity of a channel of one type of charge carrier in a semiconductor material. This leads to some characteristics difference between them like below:
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Understanding the difference between TWT and KLYSTRON
What is Klystron?
A klystron is a specialized linear-beam vacuum tube which is used as an amplifier for high radio frequencies, from UHF up into the microwave range.
What is TWT?
A traveling-wave tube (TWT) is a specialized vacuum tube that is used in electronics to amplify radio frequency (RF) signals in the microwave range. The TWT belongs to a category of "linear beam" tubes, such as the klystron, in which the radio wave is amplified by absorbing power from a beam of electrons as it passes down the tube.
Difference between TWT and Klystron:
In summary, TWTs and klystrons are both high-power electronic devices used in RF applications, but they differ in their construction and mode of operation. TWTs are known for their high gain and bandwidth, while klystrons are known for their high output power.
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