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