A summing resistor is connected across the two sense inputs, and {HEAD ~ coupling circuitry} is operable to {TAIL ~ couple voltages} appearing across the current sensing resistors to the summing resistor 
is operable to
A summing resistor is connected across the two sense inputs , and { HEAD ~ coupling circuitry } is operable to { TAIL ~ couple voltages } appearing across the current sensing resistors to the summing resistor
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH