KEYWORDS: Analog electronics, Power supplies, Cryogenics, Quantum reading, Time division multiplexing, Sensors, Quantum detection, Digital electronics, Resistors, Cosmic microwave background
CMB-S4 is the next generation, ground-based, cosmic microwave background (CMB) observatory. It is designed to explore the scientific potential contained in the CMB temperature and polarization anisotropies. The goal of CMB-S4 is to observe the mm sky with about 500,000 transition edge sensors (TES). These cryogenic detectors are read out using time division multiplexing (TDM). Two stages of superconducting quantum interference devices (SQUIDs) are used at cryogenic temperatures for multiplexing and amplifying the signals coming from the TESs. This imposes stringent noise requirements to the electronics for readout. In this paper, we discuss the developments and the first tests of an analog front-end differential electronics daughter board. The board is based on an SiGe application-specific integrated circuit (ASIC), the AwaXe v3, developed for the readout of ATHENA’s X-IFU instrument. It provides low-noise amplification (LNA) after the cryogenic multiplexer and supplies the low noise current biasing for the two SQUID stages and TESs. This front-end electronics is expected to improve the noise performances of the CMB-S4 readout chain and help moving towards a differential and compact design.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.