Thus, during {HEAD ~ a portion}, Δ, of {TAIL ~ each period} P, there is a dead zone during which both transistors Q1 and Q2 are in non conducting condition 
of
Thus , during { HEAD ~ a portion } , Δ , of { TAIL ~ each period } P , there is a dead zone during which both transistors Q1 and Q2 are in non conducting condition
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH