THE FEUTEX TOOLKIT

Inverting Amplifier Stage

Estimate signal gain, noise gain and dominant-pole bandwidth.

Electronics workspace● Runs in your browser

01 Your input

Input resistorohmFeedback resistorohmGain bandwidthHzInput signalV

02 Your result

View or copy raw result data

Result data

FormulaG=−Rf/Rin; NG=1+Rf/Rin; BW=GBW/NG

Sources and model references

Worked example

Inputs

Input resistor: 1000 ohm
Feedback resistor: 9000 ohm
Gain bandwidth: 1000000 Hz
Input signal: 0.1 V

Expected results

Signal gain: -9 V/V
Noise gain: 10 V/V
Estimated bandwidth: 100000 Hz
Ideal output: -0.9 V

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

How to use this tool

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

Try this example

{
  "ri": 1000,
  "rf": 9000,
  "gbw": 1000000,
  "vin": 0.1
}

Accuracy and scope

Single-pole voltage-feedback amplifier; ignores output clipping and slew limits. 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.