{HEAD ~ The use} of digital feedback loops allows {TAIL ~ information} recovered from the digital signals to be precise 
allows
{ HEAD ~ The use } of digital feedback loops allows { TAIL ~ information } recovered from the digital signals to be precise
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH