I would like to change the positive and negative inputs of the amplifier, so that the top is the positive one and the bottom the negative one.

enter image description here


Use yscale=-1 to flip top-bottom, xscale=-1 to flip left-right, and scale=-1 to flip both directions at the same time.

  \draw (0,0) node[op amp] {};
  \draw (3,0) node[op amp,yscale=-1] {};

enter image description here

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