The random number generator 12, wherein {HEAD ~ the analog to digital converter} comprises {TAIL ~ a sigma delta modulator circuit} 
comprises
The random number generator 12 , wherein { HEAD ~ the analog to digital converter } comprises { TAIL ~ a sigma delta modulator circuit }
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL