New active filter synthesis tool for Qucs open-source circuit simulator

Qucs (Quite Universal Circuit Simulator) is crossplatform EDA CAD circuit simulation system. Current release is Qucs-0.0.18. Qucs is free and open-source and licensed by GPLv2+. It allows to simulate different circuits from RF to beyond. It has also open XML-based document format. All these factors make Qucs ideal candidate fro academic usage. Qucs usage aspects in electronic engineering education are considered. Active filters are widely used in communication hardware design. New Qucs-0.0.19 release will include a new active filter design tool. The details of implementation of this tool and used filter design algorithms are considered.