OhmSpiceOpen simulator

Documentation

Fully differential gain stage

Amplify a differential input while holding the output common-mode voltage at 1 V.

Analog

Use the differential and common-mode traces to inspect the balanced input and output behavior.

Editor showing the Fully differential gain stage SPICE example as an unsaved schematic.
Fully differential gain stage opens as an editable, unsaved schematic.

Open and run

  1. Open Examples from the Home ribbon.
  2. Choose Fully differential gain stage.
  3. Open Simulate and choose Setup to review the analyses.
  4. Choose Run for one analysis or Run All for the complete configured set.
  5. Select a matching Scope view after the run. Use Save as sheet to keep the example or Discard to close it.

Sheets, analyses, and Scope

Fully differential gain stage

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Setup: Transient differential response

AnalysisConfiguration
Transient
  • Step 50n
  • Stop 50u
  • Initial conditions Enabled

Scope views and expected results

Differential and common-mode outputs

Analysis: Transient

Differential inputs
  • V(vinp)
  • V(vinn)
  • Differential inputV(vinp) - V(vinn)
Outputs and common mode
  • V(voutp)
  • V(voutn)
  • Differential outputV(voutp) - V(voutn)
  • Output common mode0.5 * (V(voutp) + V(voutn))
Readouts
  • Differential input swingPk-PkV(vinp) - V(vinn)
  • Differential output swingPk-PkV(voutp) - V(voutn)
  • Output common-mode averageAverage0.5 * (V(voutp) + V(voutn))
  • Output common-mode ripplePk-Pk0.5 * (V(voutp) + V(voutn))
  • V(voutp) minimumMinV(voutp)
  • V(voutp) maximumMaxV(voutp)
  • V(voutn) minimumMinV(voutn)
  • V(voutn) maximumMaxV(voutn)

Python scripts

No Python scripts are included with this example.

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