The apparatus 25, wherein {HEAD ~ the analog to digital converter} comprises {TAIL ~ a sigma delta modulator} 
comprises
The apparatus 25 , wherein { HEAD ~ the analog to digital converter } comprises { TAIL ~ a sigma delta modulator }
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL