In general, the
MOSFET works as a switch, the
MOSFET controls the voltage and current flow between the source and drain. The working of the
MOSFET depends on the MOS capacitor, which is the semiconductor surface below the oxide layers between the source and drain terminal.
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When using the MOSFET as a switch we can drive the MOSFET to turn \u201cON\u201d faster or slower, or pass high or low currents. This ability to turn the power MOSFET \u201cON\u201d and \u201cOFF\u201d allows the device to be used as a very efficient switch with switching speeds much faster than standard bipolar junction transistors.