The first input signal is applied to a base or gate of the second transistor with {HEAD ~ regard} to {TAIL ~ said reference point} 
The first input signal is applied to a base or gate of the second transistor with { HEAD ~ regard } to { TAIL ~ said reference point }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL