Moreover, in accordance with the invention, overloading of the ECG amplifier is prevented by provision of series connected and oppositely oriented zener diodes, and parallel connected diodes in series with {HEAD ~ a blocking capacitor} for blocking {TAIL ~ DC voltage} 
for blocking
Moreover , in accordance with the invention , overloading of the ECG amplifier is prevented by provision of series connected and oppositely oriented zener diodes , and parallel connected diodes in series with { HEAD ~ a blocking capacitor } for blocking { TAIL ~ DC voltage }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL