The first comparator group 10a and the second comparator group 10b {HEAD ~ each} have {TAIL ~ a plurality} of comparators for comparing the input analogue signal with a reference voltage 
have
The first comparator group 10a and the second comparator group 10b { HEAD ~ each } have { TAIL ~ a plurality } of comparators for comparing the input analogue signal with a reference voltage
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH