{HEAD ~ Currents} from the sources selected by the switches are combined, and {TAIL ~ the total current} is mirrored to the charge pump 
{ HEAD ~ Currents } from the sources selected by the switches are combined , and { TAIL ~ the total current } is mirrored to the charge pump
HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH