Lanting T, Dobbs M, Spieler H, Lee A T, Yamamoto Y
Department of Physics, McGill University, Montreal H2T 2Y8, Canada.
Rev Sci Instrum. 2009 Sep;80(9):094501. doi: 10.1063/1.3216808.
We have designed and demonstrated a superconducting quantum interference device (SQUID) array linearized with cryogenic feedback. To achieve the necessary loop gain, a 300-element series array SQUID is constructed from three monolithic 100-element series arrays. A feedback resistor completes the loop from the SQUID output to the input coil. The short feedback path of this linearized SQUID array (LISA) allows for a substantially larger flux-locked loop bandwidth as compared to a SQUID flux-locked loop that includes a room temperature amplifier. The bandwidth, linearity, noise performance, and 3 Phi(0) dynamic range of the LISA are sufficient for its use in our target application: the multiplexed readout of transition-edge sensor bolometers.
我们设计并展示了一种通过低温反馈实现线性化的超导量子干涉器件（SQUID）阵列。为了获得所需的环路增益，一个由三个单片100元件串联阵列构成的300元件串联阵列SQUID被构建出来。一个反馈电阻完成了从SQUID输出到输入线圈的环路。与包含室温放大器的SQUID锁相环相比，这种线性化SQUID阵列（LISA）的短反馈路径允许有大得多的锁相环带宽。LISA的带宽、线性度、噪声性能和3Φ(0)动态范围足以用于我们的目标应用：过渡边缘传感器测辐射热计的多路复用读出。
