MOS and NQS

MOS and NQS
CMOS8¤>nO Lecture 5, Oct. 14, 2003
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1. Non-Quasi Static (NQS) MOS model
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2. Small signal AC equivalent circuits
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1. Chs. 7-9, Yannis Tsividis, “Operation and Modeling of The MOS
Transistor,” 2nd ed., 1999, WCB/McGraw-Hill
Non-Quasi Static (NQS) MOS Model
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Denition The transit time associated with dc operation in a MOS-
FET is the average time it takes for an electron to travel the length
of the channel:
QI
τ= (1)
IDS