Demonstration of a 47.8 GHz High-Speed FFT Processor Using Single-Flux-Quantum Technology

被引：14

作者：

Ke, Fei ^{[1
]}

Chen, Olivia ^{[2
]}

Wang, Yanzhi ^{[3
]}

Yoshikawa, Nobuyuki ^{[1
]}

机构：

[1] Yokohama Natl Univ, Dept Elect & Comp Engn, Yokohama, Kanagawa 2408501, Japan

[2] Yokohama Natl Univ, Inst Adv Sci, Yokohama, Kanagawa 2408501, Japan

[3] Northeastern Univ, Dept Elect & Comp Engn, Boston, MA 02115 USA

来源：

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 2021年 / 31卷 / 05期

关键词：

FFT; SFQ; superconducting integrated circuits;

D O I：

10.1109/TASC.2021.3059984

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A fast Fourier transform (FFT) is an algorithm that computes the discrete Fourier transform (DFT) of a sequence at high speed. FFT can convert a signal from time domain to frequency domain, and is wildly used in digital signal processing field. In this paper, a high-speed, low-power FFT processor is demonstrated up to 47.8GHz with the measured power consumption of 5.3mW, using single-flux quantum (SFQ) logic. This is the first complete FFT processor implementation using superconducting technology, performing 8-point 7-bit FFT in a bit-serial computing manner. The test chip fabricated using a 1.0 mu m 9-layer process consists of 17 455 Nb/AlOx/Nb Josephson junctions (JJs), rendering itself the largest superconducting digital circuit capable of iterative data computing. The correct operation of the chip has been experimentally confirmed at a maximum operating frequency of 47.8GHz (word speed 8GHz) by conducting on-chip high-speed testing.

引用

页数：5

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