High speed logic and memory system based on pair-creation and -annihilation of shingle flux quanta

2014 Fiscal Year Final Research Report

• Project/Area Number: 24656221
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Electron device/Electronic equipment
• Research Institution: Tohoku University
• Principal Investigator: NAKAJIMA Koji 東北大学, 電気通信研究所, 教授 (60125622)
• Co-Investigator(Kenkyū-buntansha): SATO Shigeo 東北大学, 電気通信研究所, 教授 (10282013) ; ONOMI Takeshi 東北大学, 電気通信研究所, 助教 (70312676)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 単一磁束量子 / 超伝導集積回路 / ニューラルネットワーク / 論理演算記憶回路

Outline of Final Research Achievements

We studied a possibility of superconducting level logic system in single flux quantum algorithm to investigate rf-SQUID ladder circuits and modified flux quantum parametron circuits. We confirmed the operations of AND, OR, NOT logic by using the presented circuits. Moreover, we demonstrated successfully a 4-bit parallel multiplier using a carry look-ahead adder with niobium integrated circuits to improve the performance of high-speed operation for the single flux-quantum fast Fourier transform and designed a 8-bit parallel multiplier. A neural network using superconducting quantum interference devices was fabricated and successfully demonstrated. Furthermore, we fabricated a neuron circuit using SQUIDs with niobium integrated circuits and successfully demonstrated.

Free Research Field

知的集積回路工学