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  • Blog Post: FilterPro(TM) v3.0 Released TODAY!

    janier
    Available for download now is the latest version of FilterPro TM design tool. FilterPro v3.0 offers a new and improved user interface and a more accurate and robust filter design engine, thanks to updates, such as ability to adjust passive element tolerances and view response variations; scale passive...
    on Apr 30, 2010

  • Wiki Page: FilterPro does not startup

    Foe
    Q: Filter Pro does not startup - I have a problem starting FilterPro. Whenever I start Filterpro, I immediately get the following message. I already tried to uninstall FilterPro, download the latest Setup today and re-install. But still get the same message. I'm running Windows XP Version 2002...
    on Jun 29, 2010

  • Forum Post: FilterPro 3.0 Bug with Chebychev 4th order filter

    David Velasquez Rendon
    Hello, Recently I was testing this software for designing a filter with the following specifications: Filter Type = Chebychev Low-Pass Order = 4 Gain = 2 V/V Passband Frecuency = 2 kHz Allowable Ripple = 1 dB Then after this I got this results from the software: I think this values...
    on Jul 23, 2010

  • Forum Post: Re: FilterPro 3.0 Bug with Chebychev 4th order filter

    Rick Downs - WEBENCH Design Center
    David, Thank you for bringing this to our attention. I've been playing with this all day, and there certainly seems to be something wrong here. (There seems to also be a problem realizing this in FilterPro 2). As soon as we have identified the problem and what we can do to correct it, we'll...
    on Jul 24, 2010

  • Forum Post: Re: FilterPro 2.0 Download

    Rick Downs - WEBENCH Design Center
    Nolan, I'm not sure if there's a link still up - let me look into this Monday and see if we can post a public link to FilterPro 2. I'd like to know why you think FilterPro 3 is "terrible". Yes, we left a couple things out of the first release (we're going to put them back...
    on Jul 24, 2010

  • Forum Post: Re: FilterPro 2.0 Download

    Rick Downs - WEBENCH Design Center
    Nolan, Thanks for the feedback. Here's a few comments: Nolan van Heerden I think the biggest problems I experienced are: 1) You can't specify Chebyshev ripple - this was the main reason for my frustration. Yes, when we did the rewrite, we wanted to limit what we did for the...
    on Jul 25, 2010

  • Forum Post: Re: FilterPro 3.0 Bug with Chebychev 4th order filter

    Rick Downs - WEBENCH Design Center
    David, Just an update: the FilterPro development team is looking into this, and may have found a possible cause. We need to look into it further and verify, and then work on the corrections. I'll keep you posted, and thanks again for bringing this to our attention. Rick
    on Jul 26, 2010

  • Forum Post: Re: FilterPro 3.0 Bug with Chebychev 4th order filter

    Rick Downs - WEBENCH Design Center
    David, We have found and verified the root cause of the problem you reported. It is in the design equations for Sallen-Key lowpass and highpass component value calculations when gain is greater than 1. Basically, component values are calculated without accounting for gain > 1 and hence the designed...
    on Aug 18, 2010

  • Forum Post: Re: resistor value and other question

    Rick Downs - WEBENCH Design Center
    Koray, When FilterPro first does a design, it uses exact resistor values (0%) - you can then change this by using the controls at the top right of the schematic screen: You can set both resistor and capacitor tolerances, and FilterPro will find the nearest standard value to match your design...
    on Oct 27, 2010

  • Blog Post: FilterPro v3.1 Available Now!

    janier
    Many of you have written and made repeated requests about some features in FilterPro that were turned off when it was upgraded from v2. We have heard you. Today, you will see the following changes in FilterPro v3.1: Differential Multiple-Feedback topology for Low-pass, High-pass, and Band-pass...
    on Oct 29, 2010

  • Forum Post: Re: FilterPro 3.0 Bug with Chebychev 4th order filter

    Rick Downs - WEBENCH Design Center
    David, Just wanted to alert you to the new release of FilterPro , version 3.1, which resolves the problem you were having.
    on Oct 29, 2010

  • Forum Post: Re: Different R´s and C´s value with Filterpro 3.0 and 3.1 versions

    Rick Downs - WEBENCH Design Center
    FilterPro 3.1 changes the way components are selected in Sallen-Key designs. In FilterPro 3.0, S-K filters with higher than unity gain were not implemented correctly (see this thread ). Before, R1 was always equal to R2 which required different constraints on selecting C1 and C2. Now, we have more degrees...
    on Nov 11, 2010

  • Forum Post: Re: Differential amplifier - allpass filter doable?

    Rick Downs - WEBENCH Design Center
    Can't say that I've ever tried this with an allpass filter, but this article describes how to transform any single-ended MFB design into a fully-differential one. Might be worth pursuing - take the design from FilterPro and use the procedure described in the article to make it fully differential...
    on Nov 30, 2010

  • Forum Post: FilterPro 3 displays repeating Exception Error dialogs

    Mark Celestino
    Hello All, I just installed FileterPro 3 on my MS XP Pro (SP3 & .NET 4) system. It looks great - exactly what I'm looking for, but everytime I try to click on anything other than the Wizard navigation buttons I get the following error; ======================================= FilterPro...
    on Jan 6, 2011

  • Forum Post: Re: Help..Im stuck with designing a band pass filter with frequency range (20Hz - 500Hz)

    Rick Downs - WEBENCH Design Center
    Ahmad, It's a bandpass filter, but probably not what you were actually looking for. The Stopband Bandwidth can be a little confusing. Look at the diagram on the wizard when you're entering the specifications: The Stopband Bandwidth is the width between where the blue curve intersects the stopband...
    on Jan 6, 2011

  • Forum Post: FilterPro-Windows 7, 64bit

    Paul Joseph
    Does FilterPro work for Windows 7, 64 bit installs? Please advise and thank you.
    on Jan 12, 2011

  • Forum Post: FilterPro 3: Gain < 1 not allowed?

    Ole J Gauteplass
    Hi, I just started using FilterPro 3 (3.1.0.23446) and I am surprised to see that I am not allowed to specify a gain less than 1. For an MFB filter this should be allowed. Since this is possible in FilterPro 2 it must be a bug in FilterPro 3? Br Ole
    on Feb 2, 2011

  • Forum Post: Re: Differential Active Band pass filter design

    arvind m m
    following stopband attenuation ok for my differential active BPF design- stopband attenuation @ 185 MHz = -3dB and @ 135 MHz = -3dB @ 190 MHz = -15dB and @ 130 MHz = -15dB @ 200 MHz = -50dB and @ 120 MHz = -50dB
    on Mar 10, 2011

  • Forum Post: Re: Differential Active Band pass filter design

    arvind m m
    is there possiblity to design active LOW PASS Filter with such high, 50 MHz bandwith?
    on Mar 16, 2011

  • Forum Post: Re: Differential Active Band pass filter design

    Rick Downs - WEBENCH Design Center
    Yes, there is. I did a design in FilterPro, using a 5MHz cutoff frequency, then scaled the resistors so that the cutoff was in fact 50MHz. Here's the design: The frequency response is: There is a slight peaking, so this may need a little tweaking. I wasn't sure what attenuation...
    on Mar 16, 2011

  • Forum Post: Filter Pro Graphing bug

    Tony Canas
    Dear TI, I have been using Filter Pro (V3.1.05) to design sone low-pass active filters (with excellent results!). I noticed when looking in detail at teh Bode plots, that in each decade interval of frequency there are 11 vertical grid lines insetad of 10, and that the slightly larger axis...
    on Apr 1, 2011

  • Forum Post: Re: filterpro 2.0

    Eric Boler
    I agree with Thomas. This is a feature that has caused me to revert to v2 of FilterPro. Thanks Eric
    on Apr 25, 2011

  • Forum Post: FilterPro 2.0 vs 3.1 show different component values

    Scott George
    Made design at home using FP2 and FP3 at work to find very different component values for filter at output of RTD temp sensor. Filter is 1 Hz, 2 pole LPF, Gain = 1 (0 dB), MFB Single end, Butterworth, using E96 resistors/ E12 caps. FP3 Gain plot shows -30 dB in pass band though header shows G = 1. Can...
    on May 10, 2011

  • Forum Post: Re: Designing band pass filter using STLM358

    Rick Downs - WEBENCH Design Center
    Danny, Cross over distortion would cause distortion, but shouldn't affect center frequency. What's at work here is inadequate gain bandwidth of the op amp. I put your parameters into FilterPro and created a design - the design report is attached: (Please visit the site to view this file...
    on Aug 9, 2011

  • Forum Post: Re: How can I get Filter Pro to work?

    edras pacola
    But it would be very nice to have a version running under Linux...
    on Oct 3, 2011
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