Moreover, in accordance with {HEAD ~ the invention}, {TAIL ~ overloading} of 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 DC voltage 
Moreover , in accordance with { HEAD ~ the invention } , { TAIL ~ overloading } of 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 DC voltage
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