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