Difference between revisions of "Resistor Noise"
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(Created page with "Due to the random thermal motion of charge carriers, we observe '''thermal noise''', voltage and current noise in resistive circuit elements that is proportional to absolute t...") |
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{{NumBlk|::|<math>\overline{i^2_n} = 4kTGB = \frac{4kTB}{R}</math>|{{EquationRef|2}}}} | {{NumBlk|::|<math>\overline{i^2_n} = 4kTGB = \frac{4kTB}{R}</math>|{{EquationRef|2}}}} | ||
| − | Where <math>k = 8.617 \times 10^{-5}\mathrm{\ | + | Where <math>k = 8.617 \times 10^{-5}\mathrm{\tfrac{eV}{K}}</math>, |
== Noise in Resistor Circuits == | == Noise in Resistor Circuits == | ||
Revision as of 20:44, 4 October 2020
Due to the random thermal motion of charge carriers, we observe thermal noise, voltage and current noise in resistive circuit elements that is proportional to absolute temperature.
Modeling Thermal Noise in Resistors
Consider the noisy resistor in Fig. 1. We can model this as a noiseless resistor in series with a voltage noise generator, or a noiseless resistor in parallel with a current noise generator. Since we cannot predict the voltage or current noise at any point in time, we instead specify the noise voltage or current power:
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(1)
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(2)
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Where ,
