The circuit can be modified to include a multiplication unit for multiplying the input signal, the first delayed signal or the output signal by {HEAD ~ a predetermined constant} to obtain {TAIL ~ a desired direct current gain} 
to obtain
The circuit can be modified to include a multiplication unit for multiplying the input signal , the first delayed signal or the output signal by { HEAD ~ a predetermined constant } to obtain { TAIL ~ a desired direct current gain }
OTH 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 REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL