The context
I was reading this article in Arxiv "The OpenPicoAmp : an open-source planar lipid bilayer amplifier for hands-on learning of neuroscience" (PDF available here) and found two diagrams.
I know the type of diagrams for (B) are called "circuit diagrams", but I don't know what's the name for the type of diagram of (A). Both (A) and (B) use a buffer amplifier, but I wonder if there's a common name for the type of diagram of (A).
The question
Is there a common name for the type of diagram of (A)? If not, what's the name of the blue part called? (If I recall correctly, the red part is called "buffer amplifier")

