a rotor position sensor , controlled by {HEAD ~ the position} of {TAIL ~ the rotor} , for generating a rotor position signal  
of
a rotor position sensor , controlled by { HEAD ~ the position } of { TAIL ~ the rotor } , for generating a rotor position signal
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH