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This paper describes device based on the method of measurement and reproduction ultra-small dc currents by counting electrons using the electronic multiplier (EM).
Synthesizing Josephson stepwise approximated sine waves to produce an AC quantum standard is limited by errors in the waveform transitions between quantized voltages. Many parameters have an impact on the shape of the transients. A simple model with a single equivalent time constant can be used to evaluate the influence of these parameters. Measurements of the transients allow establishment of the...
By employing an array of 620 high-Tc Josephson junctions, we have achieved a maximum quantum output voltage with approximate value of 0.1 V at a temperature of 79.2 K and a frequency of 77.465 GHz. We also demonstrate that steps on the current-voltage characteristic of an array of bicrystal junctions at voltages of 70 mV were flat over the current range of 150 muA with a relative uncertainty of 0...
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