Journal ArticleDOI
Flux-Flow-Type Josephson Linear Amplifier with Large Gain and Wide Linear Range
Reads0
Chats0
TLDR
In this paper, a linear amplifier using a flux-flow phenomenon in a long Josephson junction has been designed and tested by connecting a load resistance with a control line of width Ws (µm).Abstract:
A linear amplifier using a flux-flow phenomenon in a long Josephson junction has been designed and tested by connecting a load resistance. The present experiment has demonstrated that a current gain of 500/Ws (1/µm) is obtained for the load resistance of 9 mΩ when an input signal is applied with a control line of width Ws (µm). An equivalent circuit of the amplifier has also been presented, which shows that the device is most suitable for current amplification with large gain in low impedance circuits.read more
Citations
More filters
Journal ArticleDOI
Distributed amplifier using Josephson vortex flow transistors
TL;DR: In this article, a wideband traveling wave amplifier using vortex flow transistors is proposed, where a vortex flow transistor is a long Josephson junction used as a current controlled voltage source.
Journal ArticleDOI
Fluxon electronic devices
TL;DR: In this paper, the basic theory and properties of fluxons on Josephson transmission lines (JTL) are outlined, and basic experimental properties are illustrated by examples from the literature.
Journal ArticleDOI
Optimization of circuit parameters for the vortex flow transistor
TL;DR: In this paper, the Vortex Flow Transistor (VFT) has been proposed as a superconducting amplifying device, and a model of the transresistance, output resistance, feedthrough capacitance, and input inductance of the VFT is presented.
Optimization of circuit parameters for the vortex flow transistor
TL;DR: Caracterisation du transistor fabrique a partir d'une technologie de jonction Nb-Pb, utilise comme dispositif d'amplification des supraconducteurs.
References
More filters
Journal ArticleDOI
Thermal Fluctuations in Resonant Motion of Fluxons on a Josephson Transmission Line: Theory and Experiment
E. Joergensen,Valery P. Koshelets,Roberto Monaco,J. Mygind,Mogens Rugholm Samuelsen,Mario Salerno +5 more
TL;DR: In this paper, a theoretical expression for the radiation linewidth was derived from a full statistical treatment of thermal fluctuations in the fluxon velocity, and the result appeared to be very general and was corroborated by experimental determination of the radiation emission from overlap Nb-$I$-Pb junctions.
Journal ArticleDOI
Fabrication of High Quality NbN/Pb Josephson Tunnel Junctions with Plasma Oxidized Barriers
TL;DR: In this paper, the authors used a low energy rf plasma oxidation technique to construct tunnel junctions with extremely low sub-gap leakage current under conditions where cathode self bias voltages VCSB were below 200 V XPS study showed that NbN surface oxide layer thickness increases from 15 nm to 45 nm after Ar ions bombarded the surface at VCSBs above 200V XPS.