1000-Fold Double-Flux-Quantum Voltage Multiplier Employing Directional Propagation of Flux Quanta Through Asymmetrically Damped Junction Branches
| Autor: | Yuma Arai, Yoshinao Mizugaki, Tomoki Watanabe, Hiroshi Shimada |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Josephson effect
Physics business.industry Amplifier Converters Condensed Matter Physics Electronic Optical and Magnetic Materials Magnetic flux quantum Voltage multiplier Optoelectronics Multiplier (economics) Electrical and Electronic Engineering business Superconducting integrated circuits Electronic circuit Voltage Digital-analog conversion |
| Zdroj: | IEEE Transactions on Applied Superconductivity. 29(5):1400105-1400105-5 |
| ISSN: | 1051-8223 |
| Popis: | Precise voltage generation is a unique feature of single-flux-quantum (SFQ) circuits, in addition to their high-speed digital signal processing with low power consumption. We investigated SFQ pulse-frequency modulation D/A converters for metrological applications. In our SFQ-based D/A converters, the maximum output voltage is determined by the maximum SFQ pulse-frequency at the pulse number multiplier, and by the voltage multiplication factor at the voltage multiplier. In this study, we present our new design for a double-flux-quantum amplifier (DFQA) that works as a quantum voltage multiplier. In the new parameter set, we tuned the damping parameters of the Josephson junctions to realize proper propagation of SFQ pulses. A 1000-fold DFQA designed with the new parameter set was fabricated using a 25- ${\boldsymbol \mu} $ A/ ${\boldsymbol \mu} $ m $^2$ Nb/AlO $_x$ /Nb integration technology. A 1000-fold voltage multiplication was confirmed for the input voltage up to 43 ${\boldsymbol \mu} $ V, with a corresponding SFQ repetition frequency of 21 GHz. That is, the output voltage reached 43 mV. |
| Databáze: | OpenAIRE |
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