Two-Level Switches for Advanced Time-Division Multiplexing

Superconducting quantum interference device (SQUID)-based time-division multiplexing (TDM) is a mature and widely implemented technology used to read out transition-edge sensor arrays. As the number of pixels in modern arrays continues to increase, a higher multiplexing factor is required to reduce...

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Bibliographic Details
Published in:IEEE transactions on applied superconductivity 2019-08, Vol.29 (5), p.1-5
Main Authors: Dawson, Carl S., Chaudhuri, Saptarshi, Titus, Charles J., Hsiao-Mei Cho, Denison, Edward V., Doriese, W. Bertrand, Durkin, Malcolm, FitzGerald, Connor T., Hilton, Gene C., Irwin, Kent D., Li, Dale, O'Neil, Galen C., Reintsema, Carl D., Steffen, Zach, Stevens, Robert W., Swetz, Daniel S., Ullom, Joel N., Vale, Leila R., Weber, Joel C., Young, Betty A.
Format: Article
Language:English
Subjects:
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Current measurement
Ethernet
Multiplexing
Pixels
Resistance
Sensor arrays
SQUIDs
Subgroups
superconducting electronics
Superconducting quantum interference devices
Switches
Time division multiplexing
transition-edge sensors
Wires
Wiring
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Summary:Superconducting quantum interference device (SQUID)-based time-division multiplexing (TDM) is a mature and widely implemented technology used to read out transition-edge sensor arrays. As the number of pixels in modern arrays continues to increase, a higher multiplexing factor is required to reduce the number of wires and amplifier channels. However, as the multiplexing factor is increased, the number of row-select wires (used to turn on a row of TDM SQUIDs in a two-dimensional configuration) also increases, limiting the reduction in array wires. We present a more advanced TDM architecture that implements multi-level switching between subgroups of pixels. We show that this technique can dramatically reduce the number of required row-select lines. We also present the design, fabrication, and testing of a TDM multiplexer incorporating a two-level switch, which implements a second switch for each group of ten TDM pixels. In this implementation, a multiplexing factor of 100 can be addressed using ten group-select wiring pairs and ten row-select wiring pairs. We demonstrate multiplexer functionality and present measured operating margins of this new TDM multiplexer.
ISSN:1051-8223
1558-2515
DOI:10.1109/TASC.2019.2903394