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