{HEAD ~ The four analog switches} are also connected to {TAIL ~ a controller} which provides control signals to the switches to separately activate each switch 
are connected to
{ HEAD ~ The four analog switches } are also connected to { TAIL ~ a controller } which provides control signals to the switches to separately activate each switch
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH