Back to Search Start Over

Splitter trees of superconducting nanowire cryotrons for large fan-out

Authors :
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
Source :
Applied Physics Letters. 122:092601
Publication Year :
2023
Publisher :
AIP Publishing, 2023.

Abstract

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.

Details

ISSN :
10773118 and 00036951
Volume :
122
Database :
OpenAIRE
Journal :
Applied Physics Letters
Accession number :
edsair.doi...........e7c1b84e05e6064f61ad9e8c612b9c60
Full Text :
https://doi.org/10.1063/5.0139791