The respective sine wave signals are level converting by a high group level converter comprising a capacitor and {TAIL ~ a switch} and by a low group level converter comprising {HEAD ~ a capacitor} and a switch 
The respective sine wave signals are level converting by a high group level converter comprising a capacitor and { TAIL ~ a switch } and by a low group level converter comprising { HEAD ~ a capacitor } and a switch
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH