Thermal Noise (Johnson-Nyquist Noise)
Noise power spectral density (PSD) (V^2/Hz):
kB = Boltzmann’s constant (1.38065×10^−23 J/K), T = Temperature (K), R = Resistance (ohms)
Power across resistor (W):
Capacitor RMS noise voltage (V):
(R*f term is substituted with 1/4C: web.mit.edu/klund/www/papers/UNP_noise.pdf)
Capacitor noise charge (C):
Capacitor noise energy (J):
Resistor noise PSD at very high frequencies:
h = Planck’s constant (6.62606896×10^−34 Js), T = Temperature (K)