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Brinson, Mike and Kuznetsov, Vadim (2015) Qucs Equation-Defined and Verilog-A Higher Order Behavioral Device Models for Harmonic Balance Circuit Simulation. International Journal of Microelectronics and Computer Science, 6 (2). pp. 49-58. ISSN 2080-8755 eISSN 235-9607
This paper is concerned with the development and evaluation of a number of modeling techniques which improve Qucs Harmonic Balance simulation performance of RF compact device models. Although Qucs supports conventional SPICE semiconductor device models, whose static current/voltage and dynamic charge characteristics exhibit second and higher order derivatives may not be continuous, there is no guarantee that these will function without Harmonic Balance simulation convergence problems. The same comment also applies to a number of legacy compact semiconductor device models. The modeling of semiconductor devices centered on non-linear Equation-Defined Devices and blocks of Verilog-A code, combined with linear components, is introduced. These form a class of compact macromodel that has improved Harmonic Balance simulation performance. To illustrate the presented modeling techniques RF diode, BJT and MESFET macromodels are described and their Harmonic Balance performance simulated with Qucs and Xyce .
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