| Presentation | 2019-08-09 Design and Operation of RSFQ Distributed Output Amplifier Equipped with double-stack SQUIDs Komei Higuchi, Hiroshi Shimada, Yoshinao Mizugaki, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Recently, many groups have been proposed Rapid Single-Flux-Quantum (RSFQ) output amplifiers which are designed to connect RSFQ circuitry to room temperature electronics. We focus on a superconducting distributed amplifier (DA) comprising cascaded fundamental cells each of which comprises of an RS flip-flop and a read-out SQUID. In the previous report, a 12-stage RSFQ DA was demonstrated, in which the output voltage swing was 1.75 mV for 10 Gbps data link. Enhancement of the output voltage swing is important to realize connections with wider bandwidths from low temperature to room temperature environment. In this report, we propose a DA in which a single-SQUID is replaced with a double-SQUID. By introducing double-SQUIDs, the output voltage swing is expected to be two-fold. In simulation, the maximum output voltage swing of a 4-stage double-SQUID DA was 3.54 mV, which was 2.07 times larger than that of a single-SQUID DA. We fabricated a 4-stage double-DA using a Nb integration technology. The maximum output voltage swing of 2.93 mV was demonstrated and its operation conditions were in good agreement with the numerical results. We also designed and fabricated a 12-stage and 24-stage double-DA, each of which the maximum output voltage swings were 8.23 and 14.4 mV, respectively. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | single-flux-quantum / SQUID / output amplifier / superconducting integrated circuits |
| Paper # | SCE2019-16 |
| Date of Issue | 2019-08-02 (SCE) |
| Conference Information | |
| Committee | SCE |
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| Conference Date | 2019/8/9(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | National Institute of Advanced Industrial Science and Technology |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Device, think film, etc. |
| Chair | Satoshi Kohjiro(AIST) |
| Vice Chair | |
| Secretary | (Yokohama National Univ.) |
| 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) | Design and Operation of RSFQ Distributed Output Amplifier Equipped with double-stack SQUIDs |
| Sub Title (in English) | |
| Keyword(1) | single-flux-quantum |
| Keyword(2) | SQUID |
| Keyword(3) | output amplifier |
| Keyword(4) | superconducting integrated circuits |
| 1st Author's Name | Komei Higuchi |
| 1st Author's Affiliation | The University of Electro-Communications(UEC Tokyo) |
| 2nd Author's Name | Hiroshi Shimada |
| 2nd Author's Affiliation | The University of Electro-Communications(UEC Tokyo) |
| 3rd Author's Name | Yoshinao Mizugaki |
| 3rd Author's Affiliation | The University of Electro-Communications(UEC Tokyo) |
| Date | 2019-08-09 |
| Paper # | SCE2019-16 |
| Volume (vol) | vol.119 |
| Number (no) | SCE-164 |
| Page | pp.pp.43-48(SCE), |
| #Pages | 6 |
| Date of Issue | 2019-08-02 (SCE) |