adjusting a first negative transition parameter such that a first subsequent negative transition of {TAIL ~ the first output signal} occurs in {HEAD ~ closer temporal proximity} to a first subsequent reference negative transition time 
adjusting a first negative transition parameter such that a first subsequent negative transition of { TAIL ~ the first output signal } occurs in { HEAD ~ closer temporal proximity } to a first subsequent reference negative transition time
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH