The semiconductor integrated circuit further comprises {HEAD ~ a second bias circuit} connected to the reference voltage generating circuit and {TAIL ~ a second driver circuit} connected to the second bias circuit 
The semiconductor integrated circuit further comprises { HEAD ~ a second bias circuit } connected to the reference voltage generating circuit and { TAIL ~ a second driver circuit } connected to the second bias circuit
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH