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This work presents an improved and much more flexible setup of the dual Josephson voltage standard potentiometer. It can be used for high precision arbitrary resistance ratio measurements. For this purpose a 18 channel DAC based current source was developed to control all segments of binary divided 1-V Josephson voltage standard arrays. Additionally different types of current sources to generate the...
The accuracy of voltage waveforms, generated using programmable Josephson junction arrays, is limited by the time taken to switch between quantized levels. Relevant parameters are the time constants within the array chip, the characteristics of the cables, and the bandwidth of the bias electronics. A drive system for a 1-V SINIS array with 8192 junctions has been optimized, and a cable scheme has...
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