The circuit 22, wherein {HEAD ~ each} of {TAIL ~ the first, second, and third switch means} includes a field effect transistor 
of
The circuit 22 , wherein { HEAD ~ each } of { TAIL ~ the first , second , and third switch means } includes a field effect transistor
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH