The sigma delta modulator 1, wherein the digital to analog converter is a multi bit digital to analog converter, wherein {HEAD ~ the digital signal} is {TAIL ~ a multi bit signal} 
is
The sigma delta modulator 1 , wherein the digital to analog converter is a multi bit digital to analog converter , wherein { HEAD ~ the digital signal } is { TAIL ~ a multi bit signal }
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 TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL