Topology identification (repaired): Without the actual schematic, can we decide that “this circuit is a voltage follower” (unity-gain buffer with output tied to the inverting input and input applied to the non-inverting node)?

Introduction / Context:
A voltage follower (unity buffer) is a cornerstone op-amp configuration used for impedance buffering and isolation. Identifying it requires seeing a direct feedback from output to the inverting input and the signal applied to the non-inverting input. Without a diagram, any assertion that a pictured circuit “is a follower” cannot be confirmed. This repaired item emphasizes correct identification criteria rather than guessing.

Given Data / Assumptions:

• No schematic image or node labeling is available.
• We do not know whether the output is shorted to the inverting input.
• We do not know biasing or supply details.

Concept / Approach:
To verify a follower, confirm: (1) output returns to the inverting input with a direct connection, and (2) the input signal is applied to the non-inverting input. If a resistor divider exists instead, the circuit is a non-inverting amplifier with gain > 1; if the capacitor and resistor roles are swapped, it may be an integrator or differentiator. No such verification is possible without the schematic.

Step-by-Step Solution:

Verification / Alternative check:
Once a schematic is provided, measure Vout/Vin; a follower yields ≈1 over the usable bandwidth, with high input and low output impedance.

Why Other Options Are Wrong:

Common Pitfalls:
Assuming any non-inverting stage is a follower; ignoring the effect of resistor ratios on gain.

Final Answer:
Cannot be determined from the information provided