Current amplifier OpAmp (CC-OpAmp), a component acting like an perfect bipolar transistor. Two usual and equivalent symbols for this component:
On top as a so called "Diamond Transistor"
Below the equivalent ISO symbol for a CC-OpAmp.Pinning:

B: "Base" -&gt; "positive current input"
E: "Emitter" -&gt; "negative current input"
C: "Collector" -&gt; "current output"
Own work
wdwd