Microstrip superconducting quantum interference device amplifier: Conditional stability

Kinion, D.; Clarke, John
April 2010
Applied Physics Letters;4/26/2010, Vol. 96 Issue 17, p172501
Academic Journal
The scattering parameters of an amplifier based on a dc superconducting quantum interference device are directly measured at 4.2 K as functions of the bias current and applied magnetic flux. These parameters are used to determine the stability of the amplifier with arbitrary source and output load impedances. It was found that the amplifier is conditionally stable, and that the stability is improved by decreasing the gain or adding negative feedback. With suitable bias selection, the amplifier is shown to be sufficiently stable to allow operation with a resonant source impedance.


Related Articles

  • Superconducting quantum interference device without Josephson junctions. Burlakov, A.; Gurtovoi, V.; Il'in, A.; Nikulov, A.; Tulin, V. // JETP Letters;Apr2014, Vol. 99 Issue 3, p169 

    A new type of a superconducting quantum interference device (SQUID) based on a single superconducting loop without Josephson junctions and with asymmetric contacts has been proposed. This SQUID offers advantages in simplicity of fabrication and a steeper dependence of measured quantities on the...

  • Long baseline planar superconducting gradiometer for biomagnetic imaging. Granata, C.; Vettoliere, A.; Nappi, C.; Lisitskiy, M.; Russo, M. // Applied Physics Letters;7/27/2009, Vol. 95 Issue 4, p042502 

    A niobium based dc-superconducting quantum interference device (SQUID) planar gradiometer with a long baseline (50 mm) for biomagnetic applications has been developed. The pickup antenna consists of two integrated rectangular coils connected in series and magnetically coupled to a dc-SQUID in a...

  • Quantum Interference in Bismuth Nanowires: Evidence for Surface Charges. Konopko, L.; Huber, T.; Nikolaeva, A. // Journal of Low Temperature Physics;Mar2011, Vol. 162 Issue 5/6, p524 

    We report the results of studies of the transverse magnetoresistance (MR) of single-crystal Bi nanowires with diameter d<80 nm. The single-crystal nanowire samples were prepared by the Taylor-Ulitovsky technique. Due to the semimetal-to-semiconductor transformation and high density of surface...

  • Spin accumulation and pure spin current in a three-terminal quantum dot ring with Rashba spin-orbit effect. Chi, Feng; Zheng, Jun; Sun, Lian-Liang // Journal of Applied Physics;Aug2008, Vol. 104 Issue 4, p043707 

    Based on the Keldysh nonequilibrium Green’s function technique, we study the spin accumulation and the pure spin current in a three-terminal quantum ring device, in which a quantum dot (QD) is inserted in one arm of the ring and the Rashba spin-orbit interaction (RSOI) exists in the...

  • Superconducting Wire Network under Spatially Modulated Magnetic Field. Sano, Hirotaka; Endo, Akira; Katsumoto, Shingo; Iye, Yasuhiro // AIP Conference Proceedings;2006, Vol. 850 Issue 1, p747 

    A two-dimensional (2D) superconducting square network under spatially modulated magnetic field is studied. The super/normal phase boundaries were measured with field modulation varied. The dependence on the strength of field modulation exhibited the behavior reproducing the calculation we had...

  • Accurate periodicity measurement of superconducting quantum interference device magnetic flux response. Nakanishi, Masakazu // Review of Scientific Instruments;Sep2010, Vol. 81 Issue 9, p094703 

    It is theoretically explained that a response of a superconducting quantum interference device (SQUID) is periodically dependent on total magnetic flux coupling to the SQUID ring ([uppercase_phi_synonym]) and its period is a flux quantum ([uppercase_phi_synonym]o=h/2e, where h and e,...

  • Silicon superconducting quantum interference device. Duvauchelle, J. E.; Francheteau, A.; Marcenat, C.; Chiodi, F.; Débarre, D.; Hasselbach, K.; Kirtley, J. R.; Lefloch, F. // Applied Physics Letters;8/17/2015, Vol. 107 Issue 7, p072601-1 

    We have studied a Superconducting Quantum Interference Device (SQUID) made from a single layer thin film of superconducting silicon. The superconducting layer is obtained by heavily doping a silicon wafer with boron atoms using the gas immersion laser doping technique. The SQUID is composed of...

  • Note: Increasing dynamic range of digital-to-analog converter using a superconducting quantum interference device. Masakazu Nakanishi // Review of Scientific Instruments;2014, Vol. 85 Issue 10, p1 

    Responses of a superconducting quantum interference device (SQUID) are periodically dependent on magnetic flux coupling to its superconducting ring and the period is a flux quantum (Φo = h/2e, where h and e, respectively, express Planck's constant and elementary charge). Using this...

  • A Josephson radiation comb generator. Solinas, P.; Gasparinetti, S.; Golubev, D.; Giazotto, F. // Scientific Reports;7/24/2015, p12260 

    We propose the implementation of a Josephson Radiation Comb Generator (JRCG) based on a dc superconducting quantum interference device (SQUID) driven by an external magnetic field. When the magnetic flux crosses a diffraction node of the critical current interference pattern, the superconducting...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics