I am working on design of basic circuitry for EMG. Would anyone please provide the simple model to design EMG within less time?
You will need an operation amplifier (OpAmp).
Circuit diagrams can be found with Google image search.
https://www.google.com/webhp?tab=ww&#q=emg+opamp
https://www.google.com/search?q=emg+opamp&tbm=isch
Regards,
Joachim
EMG means ElectroMyoGraphy is a test which checks the health of the muscles and the nerves that control the muscles.
ECG means ElectroCardioGram is a diagnostic tool which is routinely used to assess the electrical and muscular functions of the heart.
which circuit do you need?
You can find a model description here:
"A Dynamical Model for Generating Synthetic Electrocardiogram Signals" by Patrick E. McSharry
or here:
"Filtering Noisy ECG Signals Using the Extended Kalman Filter Based on a Modified Dynamic ECG Model" by R Sameni
Hope this could help you
Dear you can try following code in MATLAB for ECG generation :
run = 1;
while (run == 1)%while loop allows user to run the program again if they want to
%build x axis array
x=0.60008:0.00008:1.4;
%query user to see if want to create a defualt typical ECG or custom ECG
default=input('Press 1 if u want default ecg signal else press 2:\n');
if(default==1)
%default waveform values
li=30/72;
%P wave and PR interval default settings
a_pwav=0.25; %P wave amplitude
d_pwav=0.09; %P wave duration
t_pwav=0.16; %PR interval. This combined with P wave duration defines PR segment
%Q wave default settings
a_qwav=0.025; %Q wave amplitude
d_qwav=0.066; %Q wave duration
t_qwav=0.166; %not adjustable in program
%R wave default settings
a_qrswav=1.6; %R wave amplitude
d_qrswav=0.11; %R wave duration
%S wave default settings
a_swav=0.25; %S wave amplitude
d_swav=0.066; %S wave duration
t_swav=0.09; %not adjustable in program
%T wave default settings
a_twav=0.35; %T wave amplitude
d_twav=0.142; %T wave duration
t_twav=0.2; %ST Interval
%U wave default settings
a_uwav=0.035; %U wave amplitude
d_uwav=0.0476; %U wave duration
t_uwav=0.433; %not adjustable in program
else
rate=input('\n\nenter the heart beat rate :');
li=30/rate;
%p wave specifications
fprintf('\n\np wave specifications\n');
d=input('Enter 1 for default specification else press 2: \n');
if(d==1)
a_pwav=0.25;
d_pwav=0.09;
t_pwav=0.16;
else
a_pwav=input('amplitude = ');
d_pwav=input('duration = ');
t_pwav=input('p-r interval = ');
d=0;
end
%q wave specifications
fprintf('\n\nq wave specifications\n');
d=input('Enter 1 for default specification else press 2: \n');
if(d==1)
a_qwav=0.025;
d_qwav=0.066;
t_qwav=0.166;
else
a_qwav=input('amplitude = ');
d_qwav=input('duration = ');
t_qwav=0.166;
d=0;
end
%qrs wave specifications
fprintf('\n\nqrs wave specifications\n');
d=input('Enter 1 for default specification else press 2: \n');
if(d==1)
a_qrswav=1.6;
d_qrswav=0.11;
else
a_qrswav=input('amplitude = ');
d_qrswav=input('duration = ');
d=0;
end
%s wave specifications
fprintf('\n\ns wave specifications\n');
d=input('Enter 1 for default specification else press 2: \n');
if(d==1)
a_swav=0.25;
d_swav=0.066;
t_swav=0.09;
else
a_swav=input('amplitude = ');
d_swav=input('duration = ');
t_swav=0.09;
d=0;
end
%t wave specifications
fprintf('\n\nt wave specifications\n');
d=input('Enter 1 for default specification else press 2: \n');
if(d==1)
a_twav=0.35;
d_twav=0.142;
t_twav=0.2;
else
a_twav=input('amplitude = ');
d_twav=input('duration = ');
t_twav=input('s-t interval = ');
d=0;
end
%u wave specifications
fprintf('\n\nu wave specifications\n');
d=input('Enter 1 for default specification else press 2: \n');
if(d==1)
a_uwav=0.035;
d_uwav=0.0476;
t_uwav=0.433;
else
a_uwav=input('amplitude = ');
d_uwav=input('duration = ');
t_uwav=0.433;
d=0;
end
end
pwav=p_wav(x,a_pwav,d_pwav,t_pwav,li);
%qwav output
qwav=q_wav(x,a_qwav,d_qwav,t_qwav,li);
%qrswav output
qrswav=qrs_wav(x,a_qrswav,d_qrswav,li);
%swav output
swav=s_wav(x,a_swav,d_swav,t_swav,li);
%twav output
twav=t_wav(x,a_twav,d_twav,t_twav,li);
%uwav output
uwav=u_wav(x,a_uwav,d_uwav,t_uwav,li);
%ecg output
ecg=pwav+qrswav+twav+swav+qwav+uwav;
figure(1)
%ecg
plot(x,ecg);
%Query the user to see what they want to do with the ECG waveform
fprintf('Enter 1 to send to 33521A or 33522A\n');
fprintf('Enter 2 to send to .CSV file\n');
fprintf('Enter anything else to exit\n');
whereTo=input('Enter: ');
if(whereTo==1)
%query user for waveform name
arbName = input('Enter a name for the waveform: ','S');
ecgScaled = ampScale(ecg); %scale waveform amplitude for AWG
arbTo33500(ecgScaled,arbName); %send arb to a 33521A or 33522A
elseif(whereTo==2)
%query user for name of CSV file where waveform will be stored
csvName= input('Enter a name for the waveform: ','S');
csvName = [csvName '.csv'];
dlmwrite(csvName, ecg', 'coffset', 0, 'roffset', 0);
else
%fprintf('do nothing\n');
end
%Query the user to see if they want to run the program again or exit
run = input('Enter 1 to run program again or any other number to exit: ');
if(run ~= 1)
run = 69;
end
end
fprintf('Done and outta here.......\n');
Scott Harden's website has some extremely basic designs that work.
http://www.swharden.com/blog/images/simple_ecg_circuit2-525x374.png
http://www.swharden.com/blog/images/diy_ecg_circuit-500x449.png
If your version of 'simple' is more complicated, there are reference designs on the TI.com medical front-ends page which might help.
http://www.ti.com/lsds/ti/data-converters/medical-analog-front-end-products.page
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