{"title":"A Cryo-CMOS Homodyne-Demodulation Qubit Readout IC With Continuous-Time Analog Integration for SNR Improvement","authors":"Donggyu Minn;Kiseo Kang;Jaeho Lee;Jae-Yoon Sim","doi":"10.1109/LSSC.2023.3307456","DOIUrl":null,"url":null,"abstract":"This letter presents a homodyne-demodulation readout IC with continuous-time direct analog integration for superconducting qubits. By integration at the analog front end, the effective signal-to-noise ratio is efficiently increased, eliminating the need for a high-performance analog-to-digital converter and costly baseband processing for data recovery. The proposed IC, fabricated in 40-nm CMOS, is verified at 4 K in a dilution refrigerator. The readout fidelity, estimated under real-world conditions, is reported to be 99% within 300 ns.","PeriodicalId":13032,"journal":{"name":"IEEE Solid-State Circuits Letters","volume":null,"pages":null},"PeriodicalIF":2.2000,"publicationDate":"2023-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE Solid-State Circuits Letters","FirstCategoryId":"1085","ListUrlMain":"https://ieeexplore.ieee.org/document/10226428/","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"COMPUTER SCIENCE, HARDWARE & ARCHITECTURE","Score":null,"Total":0}
引用次数: 0
Abstract
This letter presents a homodyne-demodulation readout IC with continuous-time direct analog integration for superconducting qubits. By integration at the analog front end, the effective signal-to-noise ratio is efficiently increased, eliminating the need for a high-performance analog-to-digital converter and costly baseband processing for data recovery. The proposed IC, fabricated in 40-nm CMOS, is verified at 4 K in a dilution refrigerator. The readout fidelity, estimated under real-world conditions, is reported to be 99% within 300 ns.