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Filter Wiz PRO active filter designer

Filter Wiz PRO active filter designer version 4 has just been released. Version 4 represents a major advance in the rapid design of stable and effective active filters.

All-new features:

  • completely new interface

    - allows instant access to all completed phases of the filter design, and presents information and choices with clarity and ease of use

  • 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

  • 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

  • more circuit topologies

    - includes new topologies (circuits), and many variations of existing topologies, including voltage divider inputs to better meet optimal stage gain requirements

  • 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

  • Monte Carlo analysis

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

  • Temperature Effect analysis

    - determine response change due to environmental temperature rise and component temperature coefficients

  • "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



Filter Wiz PRO can be freely downloaded for evaluation, without time restriction. Resitor values and some additional output data are masked. This masking is removed once a licence is purchased and the registration information is entered.


This is the opening window of Filter Wiz PRO - where the active filter type (lowpass, highpass, bandpass, bandstop or user-defined) is selected, and the active filter specifications are entered:


Filter Wiz PRO active filter design

Please download Filter Wiz PRO to view the many windows and design aids.

Filter Wiz PRO version 4.26 download

Filter Wiz PRO can be downloaded for free and evaluated indefinitely. However,in each design created by the application, resistor values are masked. Purchase of a product licence, and registration of the product, removes this restriction

A single-user license authorizes the licencee (only) to operate the software on two computers, such as a work computer and a home computer.


Compatible with Windows Vista, XP, 2K


EXE setup file:


FWPRO_Setup.exe 4.96 MB Filter Wiz PRO active filter design

Zipped setup file:


FWPRO_Setup.zip 4.85 MB Filter Wiz PRO active filter design


Please report any dowloading problems to support@schematica.com.