can i use this method(to design ECG system ) ?

[jamed]

Hi:
i have a project to design ECG system:
read ECG signal by using (DAQ)data aquestion and the Signal processing(bandpass& notch filter) will be done by using matlab program.

I was Intended to use instrument amplifier to obtain I,II or III signals
as this figure:

but my supervisor told me:
amplify each lead separately (LA,RA or LL , and RL as reference) and read it by DAQ
then inside MATLAB we can obtain I,II and III signals, mathematically according to these equations:
I=LA-RA,II=LL-RA and III=LL-LA

so,what's your opinion about this method(of my supervisor), can succeed??
should i use instrument amplifier or just operational amplifier?

 

[tpetar]

See this project:
https://www.swharden.com/blog/2012-06-14-multichannel-usb-analog-sensor-with-atmega48/

 

[jamed]

See this project:
https://www.swharden.com/blog/2012-06-14-multichannel-usb-analog-sensor-with-atmega48/

i didn't find what i need

 

[goldsmith]

Hi jamed
Well , you're going to make an ECG ! first : as i know right leg of each human is considered as ground of body !
And a suggestion : take a look into datasheet of AD620 . one of the applications of this high gain amplifier is ECG . the manufacturer has suggested some circuits for this purpose .
Best Wishes
Goldsmith