What is a MOS tube (field effect tube)? What does it do?

MOSTube also known asField effect tube, a wide range of uses, including TV high frequency head (high frequency, small current) to switching power supply (high voltage and large current), it is metal, oxide, semiconductor, field effect transistor, or called metal, insulator, semiconductor.MOStubularsourceanddrainIt's interchangeable. They're both inPtypebackgatemesomorphicNType area. In most cases, the two regions are the same, and even if the two ends are switched, the performance of the device will not be affected. Such devices are considered to be symmetrical.

A bipolar transistor amplifies a small change in current at the input and outputs a large change in current at the output. The gain of a bipolar transistor is defined as the ratio of output to input current (beta). Another type of transistor, called a field effect tube,FET) to convert a change in input voltage into a change in output current.FETThe gain of theta is equal to thistransconductance. Defined as the ratio of the change in output current to the change in input voltage. What is common in the market is generallyNChannel sumPFor details, please refer to the picture on the right (NChannel depletion typeMOSTube). whilePLow pressure is common in the channelmosTube.

The FET affects the current flowing through the transistor by projecting an electric field onto an insulating layer. No current actually flows through this insulator, soFETtubularGATEThe current is very small. Most commonFETUsing a thin layer of silicaGATEThe underpole insulator. Such transistors are called metal oxide semiconductors (MOS).MOS) transistor, or metal oxide semiconductor field effect tube (MOSFET). becauseMOStubeSmaller and more power-efficient, they have replaced bipolar transistors in many applications.

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