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| Presentation | 2021-08-06 14:35 Study on adiabatic quantum-flux-parametron datapaths with feedback loops adopting delay-line clocking Taiki Yamae (Yokohama Natl. Univ./JSPS Research Fellow), Naoki Takeuchi, Nobuyuki Yoshikawa (Yokohama Natl. Univ.)  SCE2021-4 Link to ES Tech. Rep. Archives: SCE2021-4 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | Adiabatic quantum-flux-parametron (AQFP) is a superconductor logic family which can operate with low switching energy. So far, we designed a 4-bit microprocessor using AQFP logic and demonstrated this microprocessor at a low frequency. In order to operate AQFP microprocessors at high frequencies, it is necessary to operate AQFP datapaths with feedback loops with small clock skews. In a previous study, we studied AQFP datapaths with feedback loops adopting 4-phase clocking, in which AQFP circuits are driven by a pair of AC excitation currents with a phase separation of 90°. However, we have not yet studied AQFP datapaths with feedback loops adopting delay-line clocking, which is a low-latency clocking scheme. In the present study, we study AQFP datapaths with feedback loops adopting delay-line clocking. AQFP datapaths adopting delay-line clocking are divided into several pipeline stages. Registers are placed between stages so that data can propagate correctly. Numerical simulation shows that a looped buffer chain that is divided into four stages and is driven by delay-line clocking can operate at 5 GHz. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | superconducting integrated circuit / adiabatic quantum-flux-parametron (AQFP) / adiabatic logic circuit / / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 121, no. 137, SCE2021-4, pp. 14-18, Aug. 2021. | |
| Paper # | SCE2021-4 | |
| Date of Issue | 2021-07-30 (SCE) | |
| ISSN | 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) | |
| Download PDF | SCE2021-4 Link to ES Tech. Rep. Archives: SCE2021-4 |
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| Conference Information | |
| Committee | SCE |
| Conference Date | 2021-08-06 - 2021-08-06 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Paper Information | |
| Registration To | SCE |
| Conference Code | 2021-08-SCE |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Study on adiabatic quantum-flux-parametron datapaths with feedback loops adopting delay-line clocking |
| Sub Title (in English) | |
| Keyword(1) | superconducting integrated circuit |
| Keyword(2) | adiabatic quantum-flux-parametron (AQFP) |
| Keyword(3) | adiabatic logic circuit |
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| 1st Author's Name | Taiki Yamae |
| 1st Author's Affiliation | Yokohama National University (Yokohama Natl. Univ./JSPS Research Fellow) |
| 2nd Author's Name | Naoki Takeuchi |
| 2nd Author's Affiliation | Yokohama National University (Yokohama Natl. Univ.) |
| 3rd Author's Name | Nobuyuki Yoshikawa |
| 3rd Author's Affiliation | Yokohama National University (Yokohama Natl. Univ.) |
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| Speaker | Author-1 |
| Date Time | 2021-08-06 14:35:00 |
| Presentation Time | 25 minutes |
| Registration for | SCE |
| Paper # | SCE2021-4 |
| Volume (vol) | vol.121 |
| Number (no) | no.137 |
| Page | pp.14-18 |
| #Pages | 5 |
| Date of Issue | 2021-07-30 (SCE) |
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