a voltage regulator, selectively enabled and disabled in {HEAD ~ response} to a control input, {TAIL ~ a pair} of voltage monitors, 
to
a voltage regulator , selectively enabled and disabled in { HEAD ~ response } to a control input , { TAIL ~ a pair } of voltage monitors ,
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH