[16a-K209-1~11] 11.5 Junction and circuit fabrication process, digital applications

11:00 AM - 11:15 AM JST(2:00 AM - 2:15 AM UTC)

[16a-K209-8] Improvement of Operating Speed of a Josephson Current Comparator by Introducing a New Operating Principle

〇Yuuki Yamanashi¹, Rikuo Yamanaka¹, Nobuyuki Yoshikawa¹ (1.Yokohama Nat'l Univ.)

Keywords:

current comparator,single flux quantum circuit,Josephson comparator

A Josephson current comparator is the fundamental circuit element of a superconducting digital circuit comprising two Josephson junctions connected in series. In this study, we introduce a new operation principle for high-speed operation of the Josephson current comparator. In the proposed operation, both of the two Josephson junctions in the Josephson current comparator switch for output of the “1”. Simulation results indicate that the time from the clock input to output of the Josephson current comparator can be shortened by about 20 ps by introducing the proposed principle of operation.