Improved primary Josephson voltage standard with a new microwave driving source

Meyer, H.‐G.; Wende, G.; Fritzsch, L.; Thrum, F.; Schubert, M.; Müller, F.; Behr, R.; Niemeyer, J.

doi:10.1109/77.783939

Cited by 13 publications

(8 citation statements)

References 4 publications

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“…In addition to the total attenuation of the transmission lines, the dielectric attenuation was measured with the method described in Ref. 16. In particular, different dielectric deposition processes were compared.…”

Section: Design Fabrication and Experimentsmentioning

confidence: 99%

Optimization of a Josephson voltage array based on frequency dependently damped superconductor–insulator–superconductor junctions

Hassel

Seppä

Grönberg

et al. 2003

Review of Scientific Instruments

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We have developed a programmable Josephson voltage standard based on an array of superconductor-insulator-superconductor junctions. The junctions are damped by an external frequency-dependent shunt circuit, which allows operation at Shapiro steps with nϾ1. We derive optimization criteria for the design parameters for a fast and stable array with low power consumption. An array able to generate 1.0 V RMS ac voltage signal with sub-ppm accuracy is experimentally demonstrated. Theoretically it is also shown that a fast programmable 10 V array can be realized.

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Section: Design Fabrication and Experimentsmentioning

confidence: 99%

Optimization of a Josephson voltage array based on frequency dependently damped superconductor–insulator–superconductor junctions

Hassel

Seppä

Grönberg

et al. 2003

Review of Scientific Instruments

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show abstract

“…The uniform microwave power distribution over all junctions is an important requirement for the formation of stable and wide steps. To achieve this, most present designs integrate the Josephson junctions into a low-impedance microstripline taking into consideration the conditions discussed in section 2.1.1 (Kohlmann et al 1997b, Hamilton and Burroughs 1995, Radparvar 1995, Endo et al 1995, Park et al 1995, Meyer et al 1999. Recently, Schubert et al (2001b) realized first 10 V arrays using a coplanar stripline (figure 1(b)).…”

Section: Designmentioning

confidence: 99%

Josephson voltage standards

Kohlmann

Behr

Funck

2003

Meas. Sci. Technol.

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This paper reviews the present state of modern Josephson voltage standards. The presentation focuses on conventional dc standards based on underdamped superconductor-insulator-superconductor junctions and programmable standards based on overdamped superconductor-insulator-normal conductor-insulator-superconductor junctions. The current developments of ac standards on the basis of pulse-driven arrays and single flux quantum-based voltage multipliers are briefly summarized.

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“…The PLO may be constructed using a commercial microwave counter with feedback capability or it may be a custom-built phase-locked loop. 59,71 Figure 8͑a͒ shows the block diagram of one example of a custom-built microwave system that is small enough to fit into the top of the cryoprobe. 59 The reference frequency for the PLO is typically obtained from a cesium clock or a global positioning system receiver.…”

Section: Measurement Systemsmentioning

confidence: 99%