The phase generation circuitry may include {TAIL ~ a plurality} of controllable delay stages arranged in series and {HEAD ~ phase detector circuitry} 
The phase generation circuitry may include { TAIL ~ a plurality } of controllable delay stages arranged in series and { HEAD ~ phase detector circuitry }
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD