| Presentation | 2021-08-06 Study on adiabatic quantum-flux-parametron datapaths with feedback loops adopting delay-line clocking Taiki Yamae, Naoki Takeuchi, Nobuyuki Yoshikawa, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(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) |
| Keyword(in English) | superconducting integrated circuit / adiabatic quantum-flux-parametron (AQFP) / adiabatic logic circuit |
| Paper # | SCE2021-4 |
| Date of Issue | 2021-07-30 (SCE) |
| Conference Information | |
| Committee | SCE |
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| Conference Date | 2021/8/6(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | Yoshio Mizugaki(Univ. of Electro-Comm.) |
| Vice Chair | |
| Secretary | (AIST) |
| Assistant | Hiroyuki Akaike(Daido Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Superconductive Electronics |
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| Language | JPN |
| 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 |
| 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.) |
| Date | 2021-08-06 |
| Paper # | SCE2021-4 |
| Volume (vol) | vol.121 |
| Number (no) | SCE-137 |
| Page | pp.pp.14-18(SCE), |
| #Pages | 5 |
| Date of Issue | 2021-07-30 (SCE) |