In this circuit, {TAIL ~ the number} of {HEAD ~ guard bits} required to guarantee round off accuracy is only two 
In this circuit , { TAIL ~ the number } of { HEAD ~ guard bits } required to guarantee round off accuracy is only two
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH