When {HEAD ~ a direct current gain} of one is desired, the first delayed signal output from the first delay unit 201 is transmitted to {TAIL ~ a reference delay unit} 205 
When { HEAD ~ a direct current gain } of one is desired , the first delayed signal output from the first delay unit 201 is transmitted to { TAIL ~ a reference delay unit } 205
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH