A fan-out circuit is a basic block for scaling up digital circuits for overcoming the limited driving capability of a single logic gate. It is particularly important for superconducting digital circuits as the driving power is typically weak for having high energy efficiency. Here, we design and fabricate a fan-out circuit for a superconducting nanowire cryotron (nTron) digital circuit. A classic splitter tree architecture is adopted. To transmit switching signal and avoid crosstalk among nTrons, we introduced an “R–L–R” interface circuit. Experimentally, a two-stage splitter tree of a fan-out number of four was demonstrated. Correct operation was observed with a minimum bit error rate (BER) of 10−6. The bias margin was 10% at BER of 10−4. The average time jitter was 82 ps. Moreover, crosstalk was not observed. Based on these results, we envision that the fan-out circuit can be used in future development of superconducting-nanowire-based circuits.
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Splitter trees of superconducting nanowire cryotrons for large fan-out
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27 February 2023
Research Article|
February 27 2023
Splitter trees of superconducting nanowire cryotrons for large fan-out
Yang-Hui Huang;
Yang-Hui Huang
(Conceptualization, Data curation, Methodology, Writing – review & editing)
1
Research Institute of Superconductor Electronics (RISE), School of Electronic Science and Engineering, Nanjing University
, Nanjing, Jiangsu 210023, China
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Qing-Yuan Zhao
;
Qing-Yuan Zhao
a)
(Conceptualization, Methodology, Supervision, Writing – review & editing)
1
Research Institute of Superconductor Electronics (RISE), School of Electronic Science and Engineering, Nanjing University
, Nanjing, Jiangsu 210023, China
2
Purple Mountain Laboratories
, Nanjing, Jiangsu 211111, China
a)Author to whom correspondence should be addressed: [email protected]
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Shi Chen;
Shi Chen
(Methodology)
1
Research Institute of Superconductor Electronics (RISE), School of Electronic Science and Engineering, Nanjing University
, Nanjing, Jiangsu 210023, China
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Hao Hao;
Hao Hao
(Methodology)
1
Research Institute of Superconductor Electronics (RISE), School of Electronic Science and Engineering, Nanjing University
, Nanjing, Jiangsu 210023, China
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Hui Wang;
Hui Wang
(Methodology)
1
Research Institute of Superconductor Electronics (RISE), School of Electronic Science and Engineering, Nanjing University
, Nanjing, Jiangsu 210023, China
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Jia-Wei Guo;
Jia-Wei Guo
(Methodology)
1
Research Institute of Superconductor Electronics (RISE), School of Electronic Science and Engineering, Nanjing University
, Nanjing, Jiangsu 210023, China
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Xue-Cou Tu
;
Xue-Cou Tu
(Methodology)
1
Research Institute of Superconductor Electronics (RISE), School of Electronic Science and Engineering, Nanjing University
, Nanjing, Jiangsu 210023, China
3
Hefei National Laboratory
, Hefei, Anhui 230088, China
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La-Bao Zhang
;
La-Bao Zhang
(Methodology)
1
Research Institute of Superconductor Electronics (RISE), School of Electronic Science and Engineering, Nanjing University
, Nanjing, Jiangsu 210023, China
3
Hefei National Laboratory
, Hefei, Anhui 230088, China
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Xiao-Qing Jia
;
Xiao-Qing Jia
(Methodology)
1
Research Institute of Superconductor Electronics (RISE), School of Electronic Science and Engineering, Nanjing University
, Nanjing, Jiangsu 210023, China
3
Hefei National Laboratory
, Hefei, Anhui 230088, China
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Jian Chen
;
Jian Chen
(Supervision)
1
Research Institute of Superconductor Electronics (RISE), School of Electronic Science and Engineering, Nanjing University
, Nanjing, Jiangsu 210023, China
2
Purple Mountain Laboratories
, Nanjing, Jiangsu 211111, China
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Lin Kang;
Lin Kang
(Supervision)
1
Research Institute of Superconductor Electronics (RISE), School of Electronic Science and Engineering, Nanjing University
, Nanjing, Jiangsu 210023, China
3
Hefei National Laboratory
, Hefei, Anhui 230088, China
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Pei-Heng Wu
Pei-Heng Wu
(Supervision)
1
Research Institute of Superconductor Electronics (RISE), School of Electronic Science and Engineering, Nanjing University
, Nanjing, Jiangsu 210023, China
3
Hefei National Laboratory
, Hefei, Anhui 230088, China
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a)Author to whom correspondence should be addressed: [email protected]
Note: This paper is part of the APL Special Collection on Advances in Superconducting Logic.
Appl. Phys. Lett. 122, 092601 (2023)
Article history
Received:
December 23 2022
Accepted:
February 11 2023
Citation
Yang-Hui Huang, Qing-Yuan Zhao, Shi Chen, Hao Hao, Hui Wang, Jia-Wei Guo, Xue-Cou Tu, La-Bao Zhang, Xiao-Qing Jia, Jian Chen, Lin Kang, Pei-Heng Wu; Splitter trees of superconducting nanowire cryotrons for large fan-out. Appl. Phys. Lett. 27 February 2023; 122 (9): 092601. https://doi.org/10.1063/5.0139791
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