Performance Analysis of Digital Flux-locked Loop Circuit with Different SQUID $V$-$\varphi$ Transfer Curves for TES Readout System

Nan Li, Xiang-xiang Ren, Le-peng Li +11

A superconducting quantum interference device (SQUID), functioning as a nonlinear response device, typically requires the incorporation of a flux-locked loop (FLL) circuit to facil…