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Transistors

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DEFINITION: Also see gallium arsenide field-effect transistor .MOSFET (metal-oxide semiconductor field-effect transistor, pronounced MAWS-feht ) is a special type of field-effect transistor ( FET ) that works by electronically varying the width of a channel along which charge carriers ( electron s or hole s) flow. The wider the channel, the better the device conducts. The charge carriers enter the channel at the  … 
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TRANSISTORS DEFINITION (continued): …  source , and exit via the drain . The width of the channel is controlled by the voltage on an electrode called the gate , which is located physically between the source and the drain and is insulated from the channel by an extremely thin layer of metal oxide.There are two ways in which a MOSFET can function. The first is known as depletion mode . When there is no voltage on the gate, the channel exhibits its maximum conductance . As the voltage on the gate increases (either positively or negatively, depending on whether the channel is made of P-type or N-type semiconductor material), the channel … 
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