Thus the currents supplied to the charge pump and to the replica charge pump are complementary in the sense that they always add to {TAIL ~ a constant total current} drawn from {HEAD ~ a common power supply} 
Thus the currents supplied to the charge pump and to the replica charge pump are complementary in the sense that they always add to { TAIL ~ a constant total current } drawn from { HEAD ~ a common power supply }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD