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  1. #1
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    ecg filters

    Hi!

    i have build ECG acquisition hardware and then acquired this signal in MATLAB and LabVIEW using DAQmx(Data Acquisition device). the sampling ratewas 500Hz.
    is this rate ok?

    please help me with further filtering process, either IIR or FIR
    My design is here


    the output is here

  2. #2
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    notch filter ecg

    Hello!

    For some reason your signal is extremely noisy.
    I'm not sure about the hardware design. In my case, I took a reference design
    from Texas Instruments. It looks similar...

    I get about 1V peak to peak. 500 Hz is OK. The signal I get is clean (even
    before filtering),

    Apparently you have a very strong noise in the high frequencies so you should
    try first to find the reason of all this noise. One other possibility is that your
    signal is too weak, which makes the noise look a lot too strong. What is the
    vertical unit? Are these volts?
    What kind of electrode are you using?

    Dora.


    Quote Originally Posted by jabbar_2008
    Hi!

    i have build ECG acquisition hardware and then acquired this signal in MATLAB and LabVIEW using DAQmx(Data Acquisition device). the sampling ratewas 500Hz.
    is this rate ok?

    please help me with further filtering process, either IIR or FIR
    My design is here

    the output is here



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  3. #3
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    iir digital ecg filter

    gud....

    your design does not include any filter...

    it would be better if you add some bandpass filter of 1-100Hz and T-notch filter for removing electrical noises from the circuit... that will suppress noise and your peaks will be clear,...

    HAPPY :D:D



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  4. #4
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    ecg filters in or

    Quote Originally Posted by akss_here
    gud....

    your design does not include any filter...

    it would be better if you add some bandpass filter of 1-100Hz and T-notch filter for removing electrical noises from the circuit... that will suppress noise and your peaks will be clear,...

    HAPPY :D:D
    please post your circuit and send me email : zigan@ymail.com
    thank b4,,:D



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  5. #5
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    iir notch filter ecg

    follow simple steps...
    search for specifications.. its not that much tough...

    IA--> Band Pass filter --> T Notch Filter ---> ECG Base Signal....

    i hope u can easily do this...

    HAPPY :D :D



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    ECG Filters?

    PLZZZZZZ DO U MIND TO SEND ME THE VI FOR THE LABVIEW, I HOPE YOU DONT MIND
    wavestorm1986@yahoo.com

    thanx



  7. #7
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    Re: ECG Filters?

    i did all processing in matlab..


    1 members found this post helpful.

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    ECG Filters

    where i can find ecg filter circuit ??

    if you have, send me plz.

    ciriceos@gmail.com



  9. #9
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    Re: ecg filters

    Quote Originally Posted by jabbar_2008 View Post
    ...help me with further filtering process, either IIR or FIR...the sampling ratewas 500Hz.
    is this rate ok?...
    Hi


    In ECG measurements, the most usual sampling rate is something 'even' multiple of standard main AC frequency in the country ( i.e.: n*2*60Hz / n*2*50Hz ). I worked with 240Hz. The reason to such choice is tha fact of that sample naturally filter the noise from power supply due samples are allways obtained from same phase of main sinusoid.

    Other care you have to be aware is to perform a notch filter in range of 35Hz-40Hz because that are the bandwidth of muscular noise.

    +++



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