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Unformatted text preview: a = 6 x 10 15 cm3 and an oxide thickness of 0.1 m. The SiO 2 has 10 10 charges cm2 . Determine the threshold voltage of the transistor. When the transistor is operated in the linear region with V D = 0.5 V, calculate the gate voltage to obtain a drain current of 2 mA. Assume L = 10 m, n = 500 cm 2 /Vsec, and Z = 100L. Calculate the g m of the device and the cutoff frequency of operation f T . (b) What changes will occur in the characteristics of the MOSFET when the gate metal is replaced by ppolysilicon doped with N a > 10 19 cm3 operated at the same current in the linear region with V D = 0.5 V? Homework assignments will appear on the web at: http://www.ece.udel.edu/~kolodzey/courses/eleg646s05.html Note: On each homework and report submission, you must please give your name, the due date, assignment number and the course number....
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 Spring '08
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