Irwin, K.
and Lehnert, K.
(2004),
Microwave SQUID multiplexer, Applied Physics Letters
(Accessed May 20, 2025)
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Microwave SQUID multiplexer
Published
Author(s)
,
Abstract
We describe a superconducting quantum interference device (SQUID) multiplexer operated at microwave frequencies. The outputs of multiple SQUIDs are simultaneously modulated at different frequencies, frequency-division multiplexed, and amplified using a high electron mobility transistor (HEMT). The large bandwidth and dynamic range provided by HEMT amplifiers should make it possible to multiplex a large number of SQUIDs in one output coaxial cable. We measure good SQUID noise performance and demonstrate the multiplexed readout of two dc SQUIDs at different resonant frequencies. In this work dc SQUIDs are used, but this approach is equally applicable to rf SQUIDs.Citation
Applied Physics Letters
Volume
85
Issue
11
Pub Type
Journals
Keywords
HEMT, multiplexer, SQUID
Citation
Issues
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Created September 12, 2004, Updated October 12, 2021