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

11:15 AM - 11:30 AM JST(2:15 AM - 2:30 AM UTC)

[16a-K209-9] Suppression of signal propagation time variation in superconducting single flux quantum circuits using Josephson junctions as inductors

〇Chikai Nakamura¹, Yuki Yamanashi^1,2, Nobuyuki Yoshikawa^1,2 (1.Yokohama Nat'l Univ, 2.Yokohama Nat'l Univ. IAS)

Keywords:

SFQ circuit,Josephson inductor,signal propagation time

In a single flux quantum circuit, the Josephson inductor (JI) is a component that utilizes the Josephson junction (JJ), which is used as a switching element, as an inductor. The critical current of the JJ can vary due to manufacturing fluctuations, which in turn can cause variations in the circuit's signal propagation time. However, it has been discovered that the JI has a suppressive effect on the variations in signal propagation time. In a proposed circuit using the JI, the variation in signal propagation time is approximately 10% smaller compared to conventional circuits.