The digital filter includes a first circuit for producing, for each time t, bank filter terms of a merged bank filter having {HEAD ~ an output value} which changes between a previous time t 1 and {TAIL ~ the time t} 
The digital filter includes a first circuit for producing , for each time t , bank filter terms of a merged bank filter having { HEAD ~ an output value } which changes between a previous time t 1 and { TAIL ~ the time t }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL