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