{TAIL ~ The current source} provides constant currents IR1 and IR2 through {HEAD ~ resistors R1} and R2, respectively 
{ TAIL ~ The current source } provides constant currents IR1 and IR2 through { HEAD ~ resistors R1 } and R2 , respectively
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH