In circuit applications, the closed-loop gain is directly related to the op-amp what?

In circuit applications, the closed-loop gain is directly related to the op-amp what?

• A. External components
• B. Internal transistors
• C. Supply voltage
• D. Temperature

Answer: (A)

The closed-loop gain is set by the external feedback network around the op-amp. The op-amp itself provides the amplification, but the actual gain in a feedback configuration is determined by the resistor values you connect outside the device (for example, inverting: gain = -Rf/Rin; non-inverting: gain = 1 + Rf/Rg). Internal transistors mainly shape the open-loop gain and input characteristics, while supply voltage and temperature can affect performance and accuracy but do not define the designed closed-loop gain. So the external components are what directly set the closed-loop gain.

The closed-loop gain is set by the external feedback network around the op-amp. The op-amp itself provides the amplification, but the actual gain in a feedback configuration is determined by the resistor values you connect outside the device (for example, inverting: gain = -Rf/Rin; non-inverting: gain = 1 + Rf/Rg). Internal transistors mainly shape the open-loop gain and input characteristics, while supply voltage and temperature can affect performance and accuracy but do not define the designed closed-loop gain. So the external components are what directly set the closed-loop gain.