def METHOD_NAME(T_noise, T_noise_max_freq, T_noise_min_freq):
    """ calculates thermal noise amplitude for a given temperature and frequency range.
    Parameters
    ----------
    T_noise: float
        temperature in Kelvin
    T_noise_max_freq: float
        max frequency in GHz
    T_noise_min_freq: float
        min frequency in GHz
    Returns
    -------
    amplitude of thermal noise
    """
    Vrms_thermal_noise = (((scipy.constants.Boltzmann * units.joule / units.kelvin) * T_noise *
                           (T_noise_max_freq - T_noise_min_freq) * 50 * units.ohm) ** 0.5)
    return Vrms_thermal_noise