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6 Apr 2017 by Lewis Loflin. Also see P-channel Power MOSFET Switch Tutorial These particular transistors are optimized for switching and not for use in audio amplifiers. The gate electrode is placed on top of a very thin insulating layer and there are a pair of small n-type regions just under the drain and source electrodes. We saw in the previous tutorial, that the gate of a junction field effect transistor, JFET must be biased in such a way as to reverse-bias the pn-junction. In this instance the MOSFET switch is connected between the load and the positive supply rail (high-side switching) as we do with PNP transistors. In a P-channel device the conventional flow of drain current is in the negative direction so a negative gate-source voltage is applied to switch the transistor “ON”. 8 Jul 2015 P-Channel MOSFET Tutorial with only Positive Voltages . float high, I would suggest replacing the circuit with a p-channel high-side transistor.MOSFET stands for Metal Oxide Silicon Field Effect Transistor or Metal Oxide Semiconductor Field The symbols for N-channel MOSFET are as given below. 7 Oct 2013 Unlike bipolar transistors, MOSFET is voltage controlled. N-Channel – For an N-Channel MOSFET, the source is connected to ground. 23 May 2016 The MOSFET (Metal Oxide Semiconductor Field Effect Transistor) is a high The N-Channel MOSFET has a N- channel region between source and drain It is a four MOSFET Block Diagram by calvin; MOSFET Switch by electronics-tutorials