{HEAD ~ Digital error amplifier} 240 includes {TAIL ~ difference operator} 242 that computes difference signal E 246 given by: 
includes
{ HEAD ~ Digital error amplifier } 240 includes { TAIL ~ difference operator } 242 that computes difference signal E 246 given by :
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH