The transconductor circuit is adapted for receiving {HEAD ~ an input voltage} from {TAIL ~ at least one voltage source} 
The transconductor circuit is adapted for receiving { HEAD ~ an input voltage } from { TAIL ~ at least one voltage source }
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL