The main differential amplifier is coupled to receive the shifted differential voltage signal and is configured to amplify {HEAD ~ the shifted differential voltage signal} to generate {TAIL ~ an output voltage signal} 
to generate
The main differential amplifier is coupled to receive the shifted differential voltage signal and is configured to amplify { HEAD ~ the shifted differential voltage signal } to generate { TAIL ~ an output voltage signal }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL