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Q. What are the advantages of the n-channel MOSFET over the p-channel?
The main advantage of the n-channel MOSFET over the p-channel is due to the fact that charge carriers in n-channel devices are the electrons which have a mobility of about 1300 cm2 /v.s. on the other hand, the charge carriers in the devices are the holes which have a mobility of about 500 cm2 /V.S.since the current in a semiconductor is directly proportional to the mobility the current in the n=-channel is more than 2 times that of the p-channel for the same dimension.
The ON resistance of the n-channel MOSFET is one third that of the p-channel .it means that in order to achieve the same value of the current and ON resistance, the p-channel requires 3 times the area of the equivalent n-channel MOSFET .thus electronic currents using n-channel are much smaller in size than those in p-channel .this results in higher packing density.
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