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