It is assumed that {TAIL ~ the protection circuit} has been operated in {HEAD ~ response} to the initializing signal b 
It is assumed that { TAIL ~ the protection circuit } has been operated in { HEAD ~ response } to the initializing signal b
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH