See figure 6.5 on slide 5. http://web.engr.uky.edu/~elias/lectures/06_MOSFET_Operation.pdf http://web.engr.uky.edu/~elias/lectures/06_MOSFET_Operation.... Abou

See figure 6.5 on slide 5. http://web.engr.uky.edu/~elias/lectures/06_MOSFET_Operation.pdf http://web.engr.uky.edu/~elias/lectures/06_MOSFET_Operation.... About the only time one sees it these days is if someone is trying to match capacitance of a second fet for charge cancellation purposes. It's not a particularly area efficient way to make a capacitor in modern processes.