Summary

Proceedings of the 2012 International Symposium on Nonlinear Theory and its Applications

2012

Session Number:D3L-D

Session:

Number:930

Studies on Couplings of SET Ring Oscillators for In-Phase Oscillation and Clock Distribution

Haruka Noda,  Keisuke Nagata,  Hisato Fujisaka,  Takeshi Kamio,  Kazuhisa Haeiwa,  

pp.930-933

Publication Date:

Online ISSN:2188-5079

DOI:10.15248/proc.1.930

PDF download (359.1KB)

Coupling among ring oscillators constructed of single-electron tunneling (SET) junctions decreases their large phase noise. However, the coupled oscillators have a problem that their spatial phase pattern varies depending on the number of oscillators. In addition, coupling structures proposed in the past are not suitable for distributing clock signals to SET logic circuits. This paper presents two types of coupled ring oscillators. Coupled oscillators proposed at first oscillate in-phase independently of the number of the oscillators. Second coupled oscillators extend spatially to distribute clock two-dimmensionally. The circuit simulation shows that the presented circuits oscillate as intended.

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