Design and Analysis of Semi-Empirical Model Parameters for Short-Channel CMOS Devices

Recently analog circuit designers are interested in structured optimization techniques to automate the process of CMOS circuit design. Geometric programming, which makes use of monomial and posynomial expressions to model MOSFET parameters, represents one such approach. The extent of accuracy in finding a global optimal solution using this approach depends on the formulation of circuit and device equations as monomials and posynomials. Being pivotal in determining device transfer characteristic, transconductance and output conductance cast a direct impact on the overall CMOS circuit behavior. In this paper we developed and substantiated high fidelity expressions of transconductance and output conductance for short-channel MOSFETs in monomial form.