This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
JohnsonNoiseEquivalentCircuits.svg en Three identical circuits resistor at finite temperature with Johnson noise In the Thveninequivalent representation noiseless resistance is in series with noisecreating voltage source In the Nortonequivalent representation noiseless resistance is in parallel with noisecreating current source