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QucsFilter(1) User Commands QucsFilter(1)

QucsFilter - A filter synthesis application.

qucsfilter [ OPTION] ...

Qucs is an integrated circuit simulator which means you will be able to setup a circuit with a graphical user interface (GUI) and simulate the large-signal, small-signal and noise behaviour of the circuit. After that simulation has finished you will be able to present the simulation results on a presentation page or window.
The software aims to support all kinds of circuit simulation types, e.g. DC, AC, S-parameter, harmonic balance analysis, noise analysis, etc.
QucsActiveFilter is the active filter synthesis tool used by Qucs. By use of an input dialog the user can create a filter which is then copied into the system-wide clipboard. In Qucs the user opens an empty schematic and presses CTRL-V (paste from clipboard). The filter schematic is now inserted and can be simulated.
Available filter types are: Butterworth, Bessel, Chebyshev, Cauer.
Available topologies are: Sallen-Key, Multifeedback and Cauer.

The latest version of Qucs can always be obtained from or

Known bugs are documented within the BUGS file. Report bugs to <>.

Copyright © 2005 Michael Margraf <>
This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Written by Vadim Kuznetsov (RA3XDH) <>.
April 2005 Debian/GNU Linux

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