{HEAD ~ The on off state} of {TAIL ~ switch} 56 is controlled by switching signals 57 coupled to a control terminal 58 of switch 56 
of
{ HEAD ~ The on off state } of { TAIL ~ switch } 56 is controlled by switching signals 57 coupled to a control terminal 58 of switch 56
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH