A review of the theory of bi-SQUIDs and the experimental studies of bi-SQUID-based devices is presented. The reported output voltage linearity of the fabricated devices ( ##IMG## [http://ej.iop.org/images/0953-2048/33/11/113001/sustaba541ieqn1.gif] {$\sim{}$} 40 to 45 dB) is much higher than that observed for dc SQUIDs ( ##IMG## [http://ej.iop.org/images/0953-2048/33/11/113001/sustaba541ieqn2.gif] {$\sim{}$} 20 dB). Recent numerical simulation evidence indicates that the linearity can be further improved to at least 60 to 70 dB. Results from a wide, multi-parameter optimization analysis are considered in the form of parameter domains for the voltage-response linearity. Thermal–noise influence, load impact and interfacing requirements are examined. Potential applications of the devices are discussed.

中文翻译：

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Bi-SQUID：针对应用程序的设计

本文介绍了bi-SQUID的理论和基于bi-SQUID的设备的实验研究。所报告的制造设备的输出电压线性度（## IMG ## [http://ej.iop.org/images/0953-2048/33/11/113001/sustaba541ieqn1.gif] {$ \ sim {} $} 40至45 dB）远远高于直流SQUID的观测值（## IMG ## [http://ej.iop.org/images/0953-2048/33/11/113001/sustaba541ieqn2.gif] {$ \ sim {} $} 20 dB）。最近的数值模拟证据表明，线性度可以进一步提高到至少60至70 dB。广泛的多参数优化分析结果以电压响应线性度的参数域形式被考虑。检查了热噪声影响，负载影响和接口要求。讨论了设备的潜在应用。