frequency multiplier for ecg signals

Discussion in 'The Projects Forum' started by racquel, Dec 15, 2010.

  1. racquel

    Thread Starter New Member

    Dec 15, 2010
    4
    0
    good day everyone.i just wanna ask something about the transmission of ecg signals. Ecg signals ranges from a very low frequency, therefore i want to use a frequency multiplier for this project. what frequency multiplier should i use so that the frequency will be be multiply up to the audio frequency for the ease of transmission.?thank you
     
  2. blueroomelectronics

    AAC Fanatic!

    Jul 22, 2007
    1,758
    98
    You could record the signal to a WAV file for example then play it back at any rate you like.
     
    racquel likes this.
  3. t06afre

    AAC Fanatic!

    May 11, 2009
    5,939
    1,222
    Sound cards are most often AC coupled and they have frequency range from about 10 Hz and up. Take a look here for design ideas. http://openeeg.sourceforge.net/doc/hw/sceeg/
    This is a EEG amplifier But still you may perhaps use the modulator approach
     
    racquel likes this.
  4. racquel

    Thread Starter New Member

    Dec 15, 2010
    4
    0
    how about the frequency multiplier?
     
  5. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
  6. #12

    Expert

    Nov 30, 2010
    16,261
    6,770
    There is no such thing as a frequency multiplier chip for audio frequencies. It is a rather complicated process. I like the answers in post #2 and #4. There are ready made computer programs that can change the frequency, but they are computer programs, not a chip or two.
     
  7. hgmjr

    Moderator

    Jan 28, 2005
    9,030
    214
    Would you be satisfied with using the low frequency ECG signal to frequency modulate an audio tone? This is along the lines of what beenthere has suggested.

    hgmjr
     
  8. t06afre

    AAC Fanatic!

    May 11, 2009
    5,939
    1,222
    What will that help as long as the soundcard blocks out lower frequencies. The bandwidth for an ECG amp should be 0.01Hz to 250Hz at least. I suggest the OP take a look at the MC1496 circuit used as AM modulator
     
  9. racquel

    Thread Starter New Member

    Dec 15, 2010
    4
    0
    your comments will be great help for me,thanks a lot
     
Loading...