The encoding circuit 11 performs {HEAD ~ multiplication} of {TAIL ~ the two inputs} thus supplied and coding of those inputs to digital signals 
of
The encoding circuit 11 performs { HEAD ~ multiplication } of { TAIL ~ the two inputs } thus supplied and coding of those inputs to digital signals
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH