Demonstration of Interface Circuits Between Half- and Single- Flux- Quantum Circuits
| Autor: | Feng Li, Yuto Takeshita, Daiki Hasegawa, Kyosuke Sano, Akira Fujimaki, Masamitsu Tanaka, Taro Yamashita |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Physics
Josephson effect business.industry Biasing Integrated circuit Condensed Matter Physics 01 natural sciences Electronic Optical and Magnetic Materials law.invention Transmission line law Rapid single flux quantum Magnetic flux quantum 0103 physical sciences Optoelectronics Electrical and Electronic Engineering Resistor 010306 general physics business Electronic circuit |
| Zdroj: | IEEE Transactions on Applied Superconductivity. 31:1-4 |
| ISSN: | 2378-7074 1051-8223 |
| Popis: | We demonstrated interface circuits between a half-flux-quantum (HFQ) circuit and a rapid single-flux-quantum (RSFQ) circuit to obtain SFQ/HFQ and HFQ/SFQ converters. These converters were created by simply inserting a resistor between an RSFQ circuit and the adjacent HFQ circuit, where both circuits are based on pulse logic. These converters enable us to create combinatory circuits that make the best use of the features of the two circuits. Using a DC/SFQ, SFQ/HFQ, HFQ/SFQ, and SFQ/DC converter, we measure an HFQ Josephson transmission line (JTL) composed of eight 0-0-π superconducting quantum interference devices (SQUIDs), which are the essential elements of an HFQ circuit. The 0-0-π SQUIDs are composed of two conventional Josephson junctions and a π-shifted ferromagnetic junction. The HFQ JTL demonstrated in this study is driven by a bias current 11-fold lower than that of a similar RSFQ JTL. These experimental results indicate that the HFQ circuit requires power that is two or more orders of magnitude lower than that of an RSFQ circuit. |
| Databáze: | OpenAIRE |
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