Wideband cryogenic amplifier for a superconducting nanowire single-photon detector. - Lianming Li; Long He; Xu Wu; Xiaokang Niu; Chao Wan; Lin Kang; Xiaoqing Jia; Labao Zhang; Qingyuan Zhao; Xuecou Tu (Frontiers Inf. Technol. Electron. Eng., 2021)