Design and fabrication of an adder circuit in the extended phase-mode logic

T. Onomi, T. Yamashita, Y. Mizugaki, K. Nakajima

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We present the design and the fabrication of an adder circuit in the extended phase-mode logic family. The phase-mode logic is a single flux quantum(SFQ) logic which utilizes an SFQ as an information bit carrier. The single-bit adder circuit is made up of an INHIBIT gate which is the basic device of the phase-mode logic. The circuit has been designed and fabricated using Nb/AlOx/Nb Josephson junctions with Josephson critical current density of 1. 0kA/cm2. In order to confirm the circuit operation the fabricated adder circuit has been tested at low speed. For investigating the possibility of a highfrequency operation dc voltages generated by fluxon pulse trains have been measured. From the Josephson voltage-frequency relation the result shows that the circuit has potential to complete the carry operation within 20psec.

Original languageEnglish
Pages (from-to)3172-3175
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Volume7
Issue number2 PART 3
Publication statusPublished - 1997 Jan 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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    Onomi, T., Yamashita, T., Mizugaki, Y., & Nakajima, K. (1997). Design and fabrication of an adder circuit in the extended phase-mode logic. IEEE Transactions on Applied Superconductivity, 7(2 PART 3), 3172-3175.