The first voltage signal has {TAIL ~ a voltage swing} which is less than a voltage differential between {HEAD ~ the voltage supply connections} 
The first voltage signal has { TAIL ~ a voltage swing } which is less than a voltage differential between { HEAD ~ the voltage supply connections }
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD