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Paper Abstract and Keywords
Presentation 2015-08-04 15:45
Proposal and Demonstration of Magnetically Coupled Quantum Flux Latch
Naoki Tsuji, Naoki Takeuchi, Tatsuya Narama (Yokohama National Univ.), Thomas Ortlepp (CiS), Yuki Yamanashi, Nobuyuki Yoshikawa (Yokohama National Univ.) SCE2015-13
Abstract (in Japanese) (See Japanese page) 
(in English) We have been developing the adiabatic quantum-flux-parametron (AQFP) as an ultra-low-power superconductor logic. In a previous study, we proposed and demonstrated the quantum-flux-latch (QFL), which is a compact and compatible latch for AQFP logic. The QFL is composed of an AQFP buffer gate and a storage loop, which are directly connected to each other. However, the operation margins were not sufficiently wide due to back actions from neighboring gates. In the present study, we propose a magnetically coupled QFL (MC-QFL), where the storage loop and the buffer gate are physically separated and magnetically coupled with each other so as to avoid the trade-off in the operation margins. The simulation results showed that the critical parameter margin of the MC-QFL is twice as large as that of the previously designed QFL. For comparison, we fabricated and demonstrated both the previously designed QFL and the MC-QFL. The measurement results showed that the MC-QFL has wider operation margins compared with the previously designed QFL.
Keyword (in Japanese) (See Japanese page) 
(in English) QFP / adiabatic logic / latch / / / / /  
Reference Info. IEICE Tech. Rep., vol. 115, no. 173, SCE2015-13, pp. 29-33, Aug. 2015.
Paper # SCE2015-13 
Date of Issue 2015-07-28 (SCE) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
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reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
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Conference Information
Committee SCE  
Conference Date 2015-08-04 - 2015-08-05 
Place (in Japanese) (See Japanese page) 
Place (in English) Yokohama National Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Signal processing technologies and their applications, etc. 
Paper Information
Registration To SCE 
Conference Code 2015-08-SCE 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Proposal and Demonstration of Magnetically Coupled Quantum Flux Latch 
Sub Title (in English)  
Keyword(1) QFP  
Keyword(2) adiabatic logic  
Keyword(3) latch  
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1st Author's Name Naoki Tsuji  
1st Author's Affiliation Yokohama National University (Yokohama National Univ.)
2nd Author's Name Naoki Takeuchi  
2nd Author's Affiliation Yokohama National University (Yokohama National Univ.)
3rd Author's Name Tatsuya Narama  
3rd Author's Affiliation Yokohama National University (Yokohama National Univ.)
4th Author's Name Thomas Ortlepp  
4th Author's Affiliation CiS Research Institute for Microsensor Systems (CiS)
5th Author's Name Yuki Yamanashi  
5th Author's Affiliation Yokohama National University (Yokohama National Univ.)
6th Author's Name Nobuyuki Yoshikawa  
6th Author's Affiliation Yokohama National University (Yokohama National Univ.)
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Speaker Author-1 
Date Time 2015-08-04 15:45:00 
Presentation Time 25 minutes 
Registration for SCE 
Paper # SCE2015-13 
Volume (vol) vol.115 
Number (no) no.173 
Page pp.29-33 
#Pages 5 
Date of Issue 2015-07-28 (SCE) 

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