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