{HEAD ~ Each current control stage} includes an operational amplifier , a pass transistor , {TAIL ~ a sense resistor} , and a feedback resistor  
includes
{ HEAD ~ Each current control stage } includes an operational amplifier , a pass transistor , { TAIL ~ a sense resistor } , and a feedback resistor
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH