Versatile high performance digital SQUID electronics
Versatile high performance digital SQUID electronics
复制标题
多功能高性能数字 SQUID 电子器件
DOI：
10.1109/77.919545
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发表时间：
2001
影响因子：
1.8
通讯作者：
W. Ludwig
中科院分区：
文献类型：
--
作者：
C. Ludwig;C. Kessler;A. J. Steinforc;W. Ludwig
数字 SQUID Electronics DSE32 专为使用 High-T/sub c/ 和 Low-T/sub c/ SQUID 的多通道系统中的 SQUID 磁力计执行软件梯度测量而开发。低噪声前置放大器后面是快速混合反馈环路，将模拟反馈环路的带宽与数字环路的精度相结合。通过重置和计算 SQUID 中的通量量子，动态范围得到了显着增加。 SQUID 和电子设备的所有参数均由固件控制，并允许自动设置和调整。数据通过噪声最小化的双向光纤以 20 Mbit/s 的速率传输。低功耗允许使用电池，进一步减少外部噪声拾取。电子布局专为多通道应用而设计，根据生物磁系统的需要。
The digital SQUID Electronics DSE32 has been developed to perform software gradiometry with SQUID magnetometers in multi-channel systems using both High-T/sub c/ and Low-T/sub c/ SQUIDs. A low-noise preamplifier is followed by a fast hybrid feedback-loop, combining the bandwidth of an analog feedback-loop with the accuracy of a digital loop. By resetting and counting of flux quanta in the SQUID, the dynamic range has been substantially increased. All parameters of SQUID and electronics are firmware controlled and allow for auto-setup and tuning. Data are transferred with a rate of 20 Mbit/s by means of noise-minimizing, bi-directional optical fiber. Low power consumption allows the use of a battery, further reducing external noise pick-up. The electronics layout is designed for multi-channel applications, as needed in biomagnetic systems.