Code-division SQUID multiplexing

被引：36

作者：

Niemack, M. D. ^{[1
]}

Beyer, J. ^{[2
]}

Cho, H. M. ^{[1
]}

Doriese, W. B. ^{[1
]}

Hilton, G. C. ^{[1
]}

Irwin, K. D. ^{[1
]}

Reintsema, C. D. ^{[1
]}

Schmidt, D. R. ^{[1
]}

Ullom, J. N. ^{[1
]}

Vale, L. R. ^{[1
]}

机构：

[1] Natl Inst Stand & Technol, Boulder, CO 80305 USA

[2] Phys Tech Bundesanstalt, D-10587 Berlin, Germany

来源：

APPLIED PHYSICS LETTERS | 2010年 / 96卷 / 16期

关键词：

ARRAYS; SENSORS;

D O I：

10.1063/1.3378772

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Multiplexed superconducting quantum interference device (SQUID) readout systems are critical for measuring large arrays of superconducting transition-edge sensors (TES). We demonstrate a code-division SQUID multiplexing (CDM) architecture that is modulated by Walsh codes. Measurements and simulations of a prototype multiplexer show that this modulation scheme is not degraded by SQUID-noise aliasing, suppresses parasitic pickup, and has low levels of crosstalk. These properties enable this architecture to scale to large TES arrays. Furthermore, CDM modulation suppresses the 1/f knee in the noise to below 20 mHz, suggesting the use of this circuit for low-frequency-noise mitigation in more general SQUID applications. (C) 2010 American Institute of Physics. [doi:10.1063/1.3378772]

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页数：3

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