The current source 106 is coupled between {HEAD ~ the junction} 104 of {TAIL ~ resistors R1} and R2 and a negative supply voltage potential, −V 
The current source 106 is coupled between { HEAD ~ the junction } 104 of { TAIL ~ resistors R1 } and R2 and a negative supply voltage potential , −V
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH