Johnson Noise Thermometry - Page 8

Johnson noise thermometer - what is Johnson noise?


Let’s first provide some background by describing Johnson noise. What is Johnson noise?

In 1927, John Johnson first noted that there was a fundamental noise generated by resistors.

In 1928, his colleague at Bell Labs (Harry Nyquist) explained the phenomenon and showed that the RMS noise generated by a resistor is given by a simple equation.


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