Open AccessAnalytical Parameter Extraction for Small-Signal Equivalent Circuit of 3D FinFET Into Sub-THz Range
Author(s) -
Muyang Qin,
Yabin Sun,
Xiaojin Li,
Yanling Shi
Publication year - 2018
Publication title -
ieee access
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.587
H-Index - 127
ISSN - 2169-3536
DOI - 10.1109/access.2018.2822672
Subject(s) - aerospace , bioengineering , communication, networking and broadcast technologies , components, circuits, devices and systems , computing and processing , engineered materials, dielectrics and plasmas , engineering profession , fields, waves and electromagnetics , general topics for engineers , geoscience , nuclear engineering , photonics and electrooptics , power, energy and industry applications , robotics and control systems , signal processing and analysis , transportation
This paper presents an improved radio frequency small-signal equivalent circuit model of deep nanometer fin field-effect transistors (FinFETs) with a 3-D device simulator. A novel parameter extraction method is proposed based on the nonlinear rational function fitting. The extrinsic gate-to-drain/source capacitances, source/drain resistances, and substrate elements are first obtained from Y-parameters under the off state. Then, the intrinsic electrical parameters are analytically determined after multibias Y-parameters fitting under the forward active mode. The model and proposed extraction method are verified with the device-simulation data of a series of sized FinFETs up to 300 GHz. Excellent agreement is obtained between the simulated and modeled S-parameters, and the calculated modeling error is under 3.74% in the whole frequency range among multibias points. Besides, the bias and geometry dependence of the small-signal parameters are discussed.
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