An impedance-modulated code-division microwave SQUID multiplexer

C. Yu, A. Ames, S. Chaudhuri, C. Dawson, K. D. Irwin, S. E. Kuenstner, D. Li, C. J. Titus

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


Large arrays of cryogenic detectors, including transition-edge sensors (TESs) or magnetic microcalorimeters (MMCs), are needed for future experiments across a wide range of applications. Complexities in integration and cryogenic wiring have driven efforts to develop cryogenic readout technologies with large multiplexing factors while maintaining minimal readout noise. One such example is the microwave SQUID multiplexer (μmux), which couples an incoming TES or magnetic calorimeter signal to a unique GHz-frequency resonance that is modulated in frequency. Here, we present a hybrid scheme combining the microwave SQUID multiplexer with code division multiplexing: the impedance-modulated code-division multiplexer (Z-CDM), which may enable an order of magnitude increase in multiplexing factor particularly for low-bandwidth signal applications.

Original languageEnglish (US)
Article number015011
JournalEngineering Research Express
Issue number1
StatePublished - Mar 2020
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Engineering


  • Code division
  • Cryogenic detectors
  • Cryogenic readout
  • Microwave SQUID
  • Multiplexing


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