The second circuit stage determines {HEAD ~ a one fourth amplitude value} by adding the first amplitude value to the one half amplitude value and dividing {TAIL ~ the result} by two, and determines a three fourths amplitude value by adding the second amplitude value to the one half amplitude value and dividing the result by two 
by dividing
The second circuit stage determines { HEAD ~ a one fourth amplitude value } by adding the first amplitude value to the one half amplitude value and dividing { TAIL ~ the result } by two , and determines a three fourths amplitude value by adding the second amplitude value to the one half amplitude value and dividing the result by two
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH