[20p-W834-1~12] 11.5 Junction and circuit fabrication process, digital applications

△ [20p-W834-2] Evaluation of an SFQ-based interface with a function of adjusting operating points

〇Shigeyuki Miyajima¹, Taro Yamashita¹, Shigehito Miki¹, Hirotaka Terai¹ (1.NICT)

Keywords:single flux quantum circuit,superconducting single photon detector,superconducting detector

We designed a single-flux-quantum (SFQ) based input interface circuit with a function of adjusting operating points and evaluated its current sensitivity for an array of superconducting single photon detectors (SSPDs). We used an external control line for adjusting the operating points of the SFQ-based input interface circuit. The current sensitivity of the input interface circuit varied in the range of 10 μA - 50 μA by supplying the external currents for the control line.