Broadband Shot Noise Measurement System at Low Temperature for Noise Thermometry Using a Tunnel Junction. - Park, Jung Hwan; Rehman, Mushtaq; Choi, Jung Suk; Ryu, Sang-Wan; Khim, Zheong G.; Song, Woon; Chong, Yonuk (IEEE Trans. Instrum. Meas., 2012)