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