150 mV脉冲驱动交流量子电压芯片的研制

doi:10.3969/j.issn.1000-1158.2025.01.05

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Abstract The superconducting chip is the core part of the Josephson arbitrary waveform synthesizer （JAWS） system. In the JAWS chip developed by the National Institute of Metrology （NIM）， tapered coplanar waveguide is utilized to compensate for variations in the driving pulse intensity experienced by Josephson junctions at different positions within the array. The electrical performance of the chip is verified through testing its I-V curves and synthesizing AC signals driven by pulses. In this chip， a Josephson junction array consisted by 4000 2-stack Nb/Nb_xSi_1–_x/Nb junctions， so there are totally 8000 junctions in serially connection. An oversampled delta-sigma pulse modulation system is used to generate a 14.4 Gbps bitstream to drive this Josephson junctions array. This array is capable to provide a 150 mV rms 1 kHz ac voltage output. The highest harmonic is the second， which is suppressed by at least 105 dBc.

Key words： electrical measurement Josephson voltage chip voltage standard pulse driven tapered coplanar waveguide Josephson junction

Received: 16 May 2024 Published: 14 January 2025

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TB971

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	Articles by authors
	XU Sisi
	CHENG Qianshuo
	LI Xiaoyu
	HAN Qina
	ZHONG Qing
	LI Jinjin
	CAO Wenhui
	ZHONG Yuan

Cite this article:

XU Sisi,CHENG Qianshuo,LI Xiaoyu, et al. Development of 150 mV Pulse-driven AC Quantum Voltage Chip[J]. Acta Metrologica Sinica, 2025, 46(1): 25-29.

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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2025.01.05 OR http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2025/V46/I1/25

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