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Circuit simulation is widely used in communication and control equipment hardware design. This article introduces an extended version of the popular Qucs circuit simulator called Qucs-0.0.19S. It is a simulation tool which supports multiple SPICE circuit simulators, including Ngspice and Xyce. The package is equipped with a graphical user interface, component and compact device modelling tools, a...
This paper is concerned with the development and evaluation of a number of modelling 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...
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