Efficient FET model parameter extraction using multi-plane data-fitting and bidirectional search technique

A novel FET small-signal model parameter extraction technique is presented. It uses a novel optimization approach, in which data fitting is carried out on two reference planes instead of only one, and the objective function, is minimized by a bidirectional search. As a result, all parameters of a commonly used 15-element small-signal FET equivalent circuit are clearly identified from only one set of measured S-parameters. Starting values are self-consistently and simply generated from measured S-parameters in the passive pinch-off operating mode. Moreover, by applying multibias data fitting, which is performed without increasing the number of ordinary optimization variables, both the overall bias-independent parasitic and bias-dependent intrinsic elements are robustly determined. Demonstration results are presented for a 0.5- mu m MESFET.<<ETX>>

[1]  Ingo Wolff,et al.  A New Approach to Nonlinear Modelling and Simulation of MESFETs and MODFETs , 1990, 1990 20th European Microwave Conference.

[2]  W. R. Curtice,et al.  Self-Consistent GaAs FET Models for Amplifier Design and Device Diagnostics , 1984 .

[3]  John W. Bandler,et al.  Microwave Device Modeling Using Efficient l/sub 1/Optimization: A Novel Approach , 1986 .

[4]  George B. Norris,et al.  Fast, accurate, on-wafer extraction of parasitic resistances and inductances in GaAs MESFETs and HEMTs , 1992, 1992 IEEE Microwave Symposium Digest MTT-S.

[5]  H. Kondoh,et al.  An Accurate FET Modelling from Measured S-Parameters , 1986, 1986 IEEE MTT-S International Microwave Symposium Digest.

[6]  John W. Bandler,et al.  Microwave device modeling using efficient l1 optimization: a novel approach , 1986 .

[7]  G. Kompa,et al.  Highly consistent FET model parameter extraction based on broadband S-parameter measurements , 1992, 1992 IEEE Microwave Symposium Digest MTT-S.

[8]  G. Kompa,et al.  FET Modelling using an Analytic Extraction Method Based on Broadband S-Parameter Measurement , 1990, 1990 20th European Microwave Conference.

[9]  John W. Bandler,et al.  An Automatic Decomposition Technique for Device Modelling and Large Circuit Design , 1987, 1987 IEEE MTT-S International Microwave Symposium Digest.

[10]  G. Dambrine,et al.  A new method for determining the FET small-signal equivalent circuit , 1988 .

[11]  W. R. Curtice,et al.  Self-Consistent GaAs FET Models for Amplifier Design and Device Diagnostics , 1984 .