**Closed loop gain** is the **gain** that results when we apply negative feedback to "tame" the open **loop gain**. The **closed loop gain** can be calculated if we know the open **loop gain** and the amount of feedback (what fraction of the output voltage is negatively fed back to the input).

Herein, what is the loop gain?

In electronics and control system theory, **loop gain** is the sum of the **gain**, expressed as a ratio or in decibels, around a feedback **loop**. In a feedback **loop**, the output of a device, process or plant is sampled and applied to alter the input, to better control the output.

What is open loop configuration?

**Open loop** OPAMP **Configuration**: In the case of amplifiers the term **open loop** indicates that no connection, exists between input and output terminals of any type. That is, the output signal is not fedback in any form as part of the input signal. In **open loop configuration**, The OPAMP functions as a high gain amplifier.

What is the gain of an op amp?

Non-Inverting **op**-**amp gain**. It offers a higher input impedance than the inverting **op amp** circuit. Basic non-inverting **operational amplifier** circuit. The **gain** of the non-inverting circuit for the **operational amplifier** is easy to determine. The calculation hinges around the fact that the voltage at both inputs is the same