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
收藏
页码:241 / 244
页数:4
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