On the other end, {HEAD ~ the output circuit} of {TAIL ~ the transistor} is connected to a second reference potential 
of
On the other end , { HEAD ~ the output circuit } of { TAIL ~ the transistor } is connected to a second reference potential
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH