Thermal Noise Calculator
Calculate Johnson-Nyquist thermal noise power, voltage, and current. Uses the formula P=kTB for noise power and V=sqrt(4kTRB) for noise voltage.
How to Use Thermal Noise Calculator
Enter the temperature in Kelvin, bandwidth in Hz, and resistance in ohms. Click Calculate Thermal Noise to see noise power (watts and dBm), noise voltage (nV), and noise current (pA).
Step-by-Step Instructions
- Enter temperature in Kelvin (default 290K)
- Enter bandwidth in Hz
- Enter resistance in ohms
- Click Calculate Thermal Noise for results
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