Whether new to active filters, or experienced in their design, Filter wiz PRO is the right software for you. Active filter design software; lowpass, highpass, bandpass and bandstop filters. Filter Wiz PRO is an active filter design software for highpass, lowpass, bandpass and bandstop electronic files using capacitors, resistors and op amps.
Provides Butterworth, Chebyshev, Elliptic and Bessel Approximations to order 20, with a variety of circuit choices.

Unlike cookbooks, textbooks and simple freeware calculators, Filter Wiz PRO offers in-depth design and highly customizable solutions.

Filter Wiz PRO Features:
1. new Quality Factor (Q) versus Filter Order (Q-N) plot
now you can visually compare all available approximations to find not only which are All-Pole, and which have (more complex) notch stages, but also quickly find those Approximations with both low Filter Order and low Maximum Q (thus providing outstandinger filter stability).

2. new Antialiasing Filter design
design an antialiasing lowpass filter for A/D conversion

3. new Op Amp selector and Slew Rate Calculator tools
find suitable op amp families by sorting on GBW, slew rate or quiescent supply current

4. built-in simulator
provides eSketch-like simulation of the filter design, including effects of op amp Gain BandWidth. The user can preview the gain response when selecting circuits for each stage. And now Filter Wiz PRO can export eSketch .ES1 files, providing two ways of transferring data from Filter Wiz PRO to eSketch PRO

5. up to 21 Approximations available
choose from 10 "standard" Approximations, plus 5 linear phase Approximations, and 6 Low-Q Approximations that are extremely useful for augmenting filter stability

6. many circuit topologies to implement filter
includes new topologies (circuits), and many variations of existing topologies, including voltage divider inputs to better meet optimal stage gain requirements.

7. cascaded stages
filters of order 3 to 20 are constructed of simpler first and second order stages cascaded together. Filter Wiz PRO lets you know what the circuit response should be for each stage, thus making tuning or troubleshooting easier.

8. more selection aids
in addition to stage gain simulation, view indicators of stage Noise (resistor noise), GBW requirement, and Gain Spread. Also view design windows showing Input Impedance (vs frequency), Passive Sensitivity, Active Sensitivity, Dynamic Range, and Tuning instructions

9. Monte Carlo analysis
simulate gain spread due to inexact component values, with a choice of 3 probability distributions - Uniform, Gaussian and Worst Case

10. Temperature Effect analysis
determine response change due to environmental temperature rise and component temperature coefficients

11. "Strategy" help windows
view help topics appropriate to each design phase, accessible through "Strategy" buttons. All help topics are also available through a standard help file.

Limitations:
* Resistor values and some additional output data are masked.

The license of this software is Free Trial Software, the price is $69.00, you can free download and get a free trial.