Hence, the frequency of operation of the power converter may be varied for {HEAD ~ regulation purposes} without losing the efficiency advantages of {TAIL ~ a narrow bandwidth drive} 
Hence , the frequency of operation of the power converter may be varied for { HEAD ~ regulation purposes } without losing the efficiency advantages of { TAIL ~ a narrow bandwidth drive }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL