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100 Hz noise spike in ECG

Talha Saleem
Intellectual 455 points

hi,

    I am doing project in ECG acquisition in C5505.  I have the good results now.  When I did its PSD in Matlab to get the insight I noticed a spike at 100 Hz. Why there a spike in the first place although I have put a notch at 100 Hz and cutoff at 150 Hz. Below is the picture for my results. .

Please advice... Thanks...

  • 0
    TI__Expert 7101 points

    Can you give a little more details about your hardware set-up and configuration?

    Regards

    Wen

  • 0 in reply to Wen Li
    Intellectual 455 points

    hi Wen,

                  I am using  C5505 EVM with ADS 1258 as its daughter board for ECG purposes. First with out any changes I noticed that there is a spike at 100 Hz so I  redesigned the FIR filter with notch at 100 Hz. But it is still there although its power is decreased very much. I just wanted to know what would be the reason of that.

    Is it from the electric bulbs or equipments etc... Please advice... Thanks.