Cryo-CMOS Model-Enabled 8-Bit Current Steering DAC Design for Quantum Computing

This paper reports an 8-bit current steering-type cryogenic digital-to-analog converter (DAC) module using HLMC 40nm low-power (40LP) technology for fast qubit initialization in quantum computers. Based on the generic design platform generated from our cryo-CMOS compact model, we optimize the circui...

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Main Authors: Hu, Yongqi, Wang, Zewei, Chen, Renhe, Tang, Zhidong, Guo, Ao, Cao, Chengwei, Wu, Weican, Chen, Shoumian, Zhao, Yuhang, Yu, Liujiang, Shang, Ganbing, Xu, Hao, Hu, Shaojian, Kou, Xufeng
Format: Conference Proceeding
Language:English
Subjects:
Computational modeling
cryo-CMOS model
cryogenic DAC
Cryogenics
Current steering
Digital-analog conversion
Logic gates
on-chip current reference
Power demand
quantum computing
Qubit
Temperature distribution
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Summary:This paper reports an 8-bit current steering-type cryogenic digital-to-analog converter (DAC) module using HLMC 40nm low-power (40LP) technology for fast qubit initialization in quantum computers. Based on the generic design platform generated from our cryo-CMOS compact model, we optimize the circuit to ensure its correct function with temperature-insensitive non-linearity. Benefiting from the integration of the nA-range on-chip current reference and appropriate gate sizing, a low power consumption of 13.8 \muW under the mixed power supply of l.1 V/1.8V is achieved in this DAC design with an active area of 0.0074 mm 2 . With the realization of the stable output range of 6 mV and fast sampling rate of 140 MS/s at low temperatures, our cryo-DAC is able to manipulate the physical qubit, hence laying a solid foundation for practical large-scale quantum computing applications.
ISSN:2158-1525
DOI:10.1109/ISCAS48785.2022.9937477