{HEAD ~ The system}, according to {TAIL ~ the invention}, positively employs a narrow portion of the width of the lock frequency range of the phase locked loop 
according to
{ HEAD ~ The system } , according to { TAIL ~ the invention } , positively employs a narrow portion of the width of the lock frequency range of the phase locked loop
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH