All content Copyright 2022 Parallel Systems Ltd.
Reference Schematic:
1. Open the opampnoise project from the C:\OrCAD_Training\PSpice directory.
This circuit uses an Analog Devices OP-42 improved Op-Amp model, see the Analog Devices web site for a note that describes the derivation of this op-amp model.
2. Edit the Simulation Profile and check the simulation settings:
3. Run the Simulation
4. When the Probe window opens, add the Trace for V(out)
5. Add a new Y Axis and add the V(inoise) trace to it to see the input referred noise.
See the bandpass response of the Sallen Key filter and the U shaped response of the input referred noise.
End of Lab
All content Copyright 2022 Parallel Systems Ltd.