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Paper Abstract and Keywords
Presentation 2013-07-22 13:55
Design and Evaluation of Magnetic Field Tolerant Single Flux Quantum Circuit
Yuki Yamanashi, Yuto Tsuga, Nobuyuki Yoshikawa (Yokohama National Univ.) SCE2013-17
Abstract (in Japanese) (See Japanese page) 
(in English) One of promising applications of a single flux quantum (SFQ) circuit is a read-out circuitry for multi-channel superconductive sensor array. In such applications, the SFQ read-out circuit is expected to operate outside a magnetic shield. We investigated an SFQ circuit structure, which is tolerant to external magnetic field, using the AIST 2.5 kA/cm2 Nb standard 2 process having 3 Nb wiring layers. By covering the whole circuit using the upper Nb wiring layer called the control (CTL) layer, influences of the external magnetic field can be avoided. We experimentally evaluated inductance of wiring layers underneath the CTL shielding layer to design the magnetic field tolerant circuit. We implemented and measured the test circuit comprising the toggle flip-flop (TFF) to evaluate its magnetic field tolerance. The operating margin and the maximum operating frequency of the test circuit did not deteriorate with increase in the applied magnetic field to the TFF, whereas the operating margin of the conventional TFF, which doesn’t have the shielding layer, is sensitive to the applied magnetic field. We have also demonstrated the high-speed operation of the designed TFF operated in the completely unshielded environment at the frequency of up to120 GHz with the wide operating margin.
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Reference Info. IEICE Tech. Rep., vol. 113, no. 149, SCE2013-17, pp. 39-42, July 2013.
Paper # SCE2013-17 
Date of Issue 2013-07-15 (SCE) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
and
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 2013-07-22 - 2013-07-22 
Place (in Japanese) (See Japanese page) 
Place (in English) Kikaishinkou-kaikan Bldg. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Signal processing technologies and their applications, etc. 
Paper Information
Registration To SCE 
Conference Code 2013-07-SCE 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Design and Evaluation of Magnetic Field Tolerant Single Flux Quantum Circuit 
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1st Author's Name Yuki Yamanashi  
1st Author's Affiliation Yokohama National University (Yokohama National Univ.)
2nd Author's Name Yuto Tsuga  
2nd Author's Affiliation Yokohama National University (Yokohama National Univ.)
3rd Author's Name Nobuyuki Yoshikawa  
3rd Author's Affiliation Yokohama National University (Yokohama National Univ.)
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Speaker Author-1 
Date Time 2013-07-22 13:55:00 
Presentation Time 25 minutes 
Registration for SCE 
Paper # SCE2013-17 
Volume (vol) vol.113 
Number (no) no.149 
Page pp.39-42 
#Pages 4 
Date of Issue 2013-07-15 (SCE) 

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