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  • 1
    Electronic Resource
    Electronic Resource
    Harmonic synchronization in resistively coupled Josephson junctions (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 75 (1994), S. 3668-3673 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The oscillations of two resistively coupled Josephson junctions biased only by a single dc current source are shown to lock harmonically in a 1:2 mode over a significant range of bias current, even when the junctions are identical. The dependence of this locking on both junction and coupling parameters is examined, and it is found that, for this particular two-junction configuration, 1:1 locking can never occur, and also that a minimum coupling coefficient is needed to support harmonic locking. Some issues related to subharmonic locking are also discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.356082
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Analog simulation of superconducting loops containing one or two Josephson junctions (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 64 (1988), S. 3112-3118 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Analog circuits are described which are capable of electronically simulating the static and dynamic behavior of superconducting loops containing one or two Josephson junctions when bias currents or magnetic fields are applied. Time-dependent flux entry into or out of the ring can, in either system, be observed by monitoring appropriate node voltages within the simulator circuits. The various dynamical modes observed in earlier numerical simulations are accurately reproduced. A theoretical analysis of the two-junction configuration identifies certain important criteria which determine which of these different states the system will adopt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.341526
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    A method of compensating for the friction of a rotating bearing (1994)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 65 (1994), S. 2402-2405 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A torque converter and an electronic driver circuit are described that will generate a compensating applied torque that is equal and opposite to the frictional torque of a bearing over a range of angular velocities. The compensated bearing is effectively frictionless. The frictional torque is assumed to have a constant component and one that is proportional to the angular velocity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1144694
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Current distribution in a high Tc superconductor (1994)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 65 (1994), S. 2070-2074 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: An experimental technique to measure the spatial surface B field distribution in a high Tc superconductor in the temperature range 15–90 K and low applied magnetic fields (less than 300 Oe) is described. A model of magnetic dipoles has been used to describe the magnetic properties of these superconductors. The surface B field is calculated and compared with the experimental data. The experimental surface B field data are used to calculate the spatial current distribution in the superconductor by a two-dimensional Fourier transform.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1144814
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Resonant steps in the characteristics of a Josephson junction coupled to a transmission line (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 70 (1991), S. 2395-2401 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A novel circuit is described which functions as an electronic analog of lumped element transmission line. The circuit requires only operational amplifiers, resistors, and capacitors. This module was coupled to a Josephson junction simulator and current voltage characteristics of the combined system were recorded. Steps were observed at voltages determined by the appropriate line resonances. When the transmission line was terminated with loads less than the characteristic impedance, chaos was seen in the lower steps. Similar results were obtained by numerical integration of the corresponding system of differential equations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.349413
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Driven pendulum for studying chaos (1989)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 60 (1989), S. 422-426 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: An instrument suitable for experimental studies of chaotic motion is described. It consists of a mechanical pendulum driven by both steady and alternating torques, together with interface electronics for data logging. An optical shaft encoder serves as the transducer for measuring the instantaneous pendulum coordinate. The entire system is controlled from a personal computer. Sample phase-plane and Poincaré plots are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1140394
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Waveform display for slowly varying signals (1986)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 57 (1986), S. 2627-2630 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Slowly changing signals will appear on an oscilloscope as a moving dot. A circuit is described which permits such waveforms to be fully displayed in real time. The oscilloscope screen functions as a window across which the signal scrolls at a user selectable rate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139071
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Dynamical properties of Josephson junctions coupled by a transmission line (1993)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 74 (1993), S. 5101-5107 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A system composed of two Josephson junctions connected by a transmission line has been studied by means of electronic analog simulation. Under external current bias, the resistive component of the coupling induces frequency locking between the two junctions at commensurate ratios. The resonant modes of the transmission line give rise to steps in the I-V characteristics of the system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.354296
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    Paper (German National Licenses)
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