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