Electronics for a Next‐Generation SQUID‐Based Time‐Domain Multiplexing System

A decade has elapsed since the design, development and realization of a SQUID‐based time‐division multiplexer at NIST. During this time the system has been used extensively for low‐temperature‐detector‐array measurements. Concurrently, there have been substantial advancements both in detector array and commercial electronic component technology. The relevance and applicability of the technology has blossomed as well, often accompanied by more demanding measurement requirements. These factors have motivated a complete redesign of the NIST room‐temperature read‐out electronics. The redesign has leveraged advancements in component technology to achieve new capabilities better suited to the SQUID multiplexers and detector arrays being realized today. As examples of specific performance enhancements, the overall system bandwidth has been increased by a factor of four (a row switching rate of 6.24 MHz), the compactness has been increased by over a factor of two (a higher number of detector columns and rows per ...