Likewise, {HEAD ~ the pulse train} fed to the base of transistor Q2 has {TAIL ~ a duty cycle} less than 50 percent but is delayed one half period from the pulse train fed to the base of transistor Q1 
has
Likewise , { HEAD ~ the pulse train } fed to the base of transistor Q2 has { TAIL ~ a duty cycle } less than 50 percent but is delayed one half period from the pulse train fed to the base of transistor Q1
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH REL TAIL 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 OTH OTH