Examples of current-controlled negative feedback?
The classical example for current-controlled voltage feedback is the common-emiiter stage with &quot;degeneration&quot; (feedback) using an emitter resistor RE. But this is one of the few cases, where the feedback loop cannot be identified by simple visual inspection.
But the block diagram helps:

The diagram is simplified assuming Ie=Ic (Ib neglected). The given gain expression (transconductance gm=Ic/Vt) can be derived directly from the circuit diagram as well as from the shown block diagram.
LOOP GAIN: As can be seen from the diagram: The loop gain is Al=-gm*RE.