A Cryo-CMOS Homodyne-Demodulation Qubit Readout IC With Continuous-Time Analog Integration for SNR Improvement

被引：5

作者：

Minn, Donggyu ^{[1
]}

Kang, Kiseo ^{[1
]}

Lee, Jaeho ^{[1
]}

Sim, Jae-Yoon ^{[1
]}

机构：

[1] Pohang Univ Sci & Technol, Dept Elect & Elect Engn, Pohang 37673, South Korea

来源：

IEEE SOLID-STATE CIRCUITS LETTERS | 2023年 / 6卷

基金：

新加坡国家研究基金会;

关键词：

Qubit; Signal to noise ratio; Mixers; Gain; Receivers; Phase locked loops; Demodulation; Cryo-CMOS; homodyne; qubit; readout; signal-to-noise ratio (SNR);

D O I：

10.1109/LSSC.2023.3307456

中图分类号：

TP3 [计算技术、计算机技术];

学科分类号：

0812 ;

摘要：

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.

引用

页码：241 / 244

页数：4

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