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moveto 0 0 
lineto 40 40
lineto 0 80
lineto 0 0
textcenter 5 20 -
textcenter 5 60 +
*label 20 40 μA
textcenter 20 40 OpAmp
solidpen 255 0 0 0
moveto 20 20 
lineto 20 -20
solidpen 0 0 255  0
moveto 20 60
lineto 20 100