The speed control module controls a speed of a motor based on {HEAD ~ an error signal} generated based on {TAIL ~ a desired speed} and back electromotive force 
generated based on
The speed control module controls a speed of a motor based on { HEAD ~ an error signal } generated based on { TAIL ~ a desired speed } and back electromotive force
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH