Dear all,
I am currently working on a project to design a data acquisition module that captures data from 10 electrodes and transmits the 12-lead ECG signals via Bluetooth.
After reading the datasheet of ADS1298 I have came to the conclusion that this device is an ideal device to capture and convert the analog signals from the electrodes, but I have a bit of issue understanding how the interface of the electrodes with the ADS1298 IC is. I also couldn't find any schematics for a 12-lead ECG application in the datasheet. The only ones I found were in other threads of the E2E forums. But even those don't have an explanation of how to generate some leads such as aVR, aVL and aVF.
For example in the schematics attached to this thread, the negative pole of many inputs are supplied from WCT signal, but I do not know the signals that are averaged in order to generate this WCT signal. is it 
I would really be thankful if someone could give me a further detailed explanation on the interface between the electrodes and the IC for this application. As you can see I have many questions.
Sincerely,
Ali Falahati
3632.PNT_AFEV1_AFE.pdf
