Butterworth, Tchebyscheff, Elliptic, Passive Filter Design Software
This free passive filter synthesis program will design lumped element Butterworth, Tchebyscheff, and elliptic, lowpass, highpass, bandpass, and bandstop filters and was featured in the July 1991 issue of RF Design Magazine. The input screen is shown below.
A schematic is drawn on screen.
Various plots and tables are available. The last two figures show magnitude response and group delay respectively.
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