Rapid Single-Flux-Quantum NOR Logic Gate Realized through the Use of Toggle Storage Loop

Yoshinao MIZUGAKI  Koki YAMAZAKI  Hiroshi SHIMADA  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E103-C   No.10   pp.547-549
Publication Date: 2020/10/01
Publicized: 2020/04/13
Online ISSN: 1745-1353
DOI: 10.1587/transele.2020ECS6005
Type of Manuscript: BRIEF PAPER
Category: Superconducting Electronics
Keyword: 
superconducting digital gates,  Nb IC,  single-flux-quantum circuits,  

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Summary: 
Recently, we demonstrated a rapid-single-flux-quantum NOT gate comprising a toggle storage loop. In this paper, we present our design and operation of a NOR gate that is a straightforward extension of the NOT gate by attaching a confluence buffer. Parameter margins wider than ±28% were confirmed in simulation. Functional tests using Nb integrated circuits demonstrated correct NOR operation with a bias margin of ±21%.