An Analytical Three-Region Two-Dimensional Model for SiGe MOSFETs Operating at Millimeter Wave Frequencies |
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Authors: | S.K. Islam V. Srinivasan F.C. Jain |
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Affiliation: | (1) Electrical & Computer Engineering Department, University of Tennessee, Knoxville, Tennessee 37996-2100, USA;(2) Electrical & Computer Engineering Department, 260 Glenbrook Road U-157, Storrs, Connecticut 06269-2157, USA |
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Abstract: | An analytical two-dimensional model for an n-channel SiGe MOSFET is presented. In this paper a three-region model for SiGe is developed. The space charge region under the gate has been divided into three regions and the two-dimensional potential distribution is found by choosing appropriate boundary conditions for the drain, source and depletion regions. The analytical model predicts unity current-gain cut-off frequency (fT) of a 0.5 m SiGe MOSFET to be over 18.6 GHz. |
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