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THE FEUTEX TOOLKIT

Finite Open-Loop Gain Error

Quantify closed-loop gain error from finite DC loop gain.

Electronics workspace● Runs in your browser
01 Your input
02 Your result
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FormulaG=NG/(1+NG/A); error=NG/(A+NG)
Sources and model references

Worked example

Inputs

Open-loop gain
100000 V/V
Ideal noise gain
10 V/V

Expected results

Actual non-inverting gain
9.9990001 V/V
Relative gain shortfall
0.0099990001 %
Loop gain
10000 ratio

Load the example in the workspace to reproduce these results. Display rounding does not change the underlying calculation.

How to use this tool

  1. Enter the labeled inputs in the indicated units.
  2. Calculate and compare every output against the stated model assumptions.

Try this example

{
  "a": 100000,
  "ng": 10
}

Accuracy and scope

DC resistive negative feedback; excludes frequency-dependent stability. Simplified analytical model; not a design recommendation or safety certification.

Is my data uploaded?

This tool runs locally in your browser. Input and output are not sent to a processing server. Copy or download your result before leaving the page.