This software allows for the design of various electronic filters using resistors, capacitors, and op amps. It offers Butterworth, Chebyshev, Elliptic, and Bessel approximations up to order 20, with lowpass, highpass, bandpass, and bandstop settings, and provides multiple circuit options.

One of the standout features of this software is that it provides Butterworth, Chebyshev, Elliptic, and Bessel Approximations up to order 20. Additionally, there are up to 11 alternate Approximation types available, including stable low-Q types.
When designing your filters, you can choose from a wide variety of circuit options. The built-in simulator is another great feature, giving you an accurate picture of filter performance. If you need to perform further analysis or simulation, you can export your filter circuit to eSketch simulation software.
One thing to note is that resistor values are masked in the demo version. However, this software is an excellent resource for designing electronic filters quickly and easily.
Version 5.48: N/A
Version 5.53:
-improved error control
-new skinning code
-fixed control positioning error
Version 5.42: N/A
Version 5.41: N/A
Version 5.35: N/A
Version 5.34: N/A
Version 5.33: N/A
Version 5.32: N/A
Version 5.30: N/A
Version 5.28: N/A