{HEAD ~ A Darlington connected pull up circuit} is also provided in {TAIL ~ parallel} with the feedback transistor which further enhances switching speed 
is provided in
{ HEAD ~ A Darlington connected pull up circuit } is also provided in { TAIL ~ parallel } with the feedback transistor which further enhances switching speed
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH