High-resolution superconducting single-flux quantum compator for sub-Kelvin temperatures

Alexander Savin, Jukka Pekola, Tommy Holmqvist, Juha Hassel, L. Grönberg, Panu Helistö, A. Kidiyarova-Shevchenko

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A design of sub-Kelvin single-flux quantum (SFQ) circuits with reduced power dissipation and additional cooling of shunt resistors has been developed and characterized. The authors demonstrate operation of SFQ comparators with current resolution of 40nA at 2GHz sampling rate. Due to improved cooling the electron temperature in shunt resistors of a SFQ comparator is below 50mK when the bath temperature is about 30mK.
Original languageEnglish
Article number133505
Pages (from-to)1-3
Number of pages3
JournalApplied Physics Letters
Issue number13
Publication statusPublished - 2006
MoE publication typeA1 Journal article-refereed


  • single-flux quantum (SFQ) circuit
  • sub-Kelvin temperature
  • supercondutor


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