The Difference Between a Pemos and an Enmos

The basic idea of the switch is that when you apply an appropriate voltage to the gate, the field effect will either allow a channel to form or it won't. The channel forms as a result of an inversion layer, which effectively is just an inversion of the normal concentration of charge carrier That typically exists. If we remove that voltage from the gate, there's no electrical contact between souce and drain, and hence the switch is off. In the next episode, we will look at how complementary metal oxide semi conductors, sea mos logic uses mot moss fets to construct logic gates.