This allows the level shifter to be designed for {HEAD ~ optimal transitional performance} without {TAIL ~ the sacrifice} of a potentially long propagation delay on the output nodes 
without
This allows the level shifter to be designed for { HEAD ~ optimal transitional performance } without { TAIL ~ the sacrifice } of a potentially long propagation delay on the output nodes
OTH OTH OTH OTH 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 OTH OTH OTH