Presentation	1999/1/27 Proposal of NAND gate based on SFQ logic Seiichiro Ono, Susumu Takada,
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Abstract(in English)	We propose an universal gate of NAND logic based on single flux quantum(SFQ)logic. The NAND gate enables to construct any logic circuits. In the proposed gate, three superconducting loops share two Josephson junctions in common. The Josephson critical currents were designed to allow two loops among them to keep single flux quantum at the same time. Using this system, the proposed gate can perform NAND logic function. We simulated dynamic operation of this NAND gate using JSIM program. The simulations assume that a critical current density of Nb/AlO_x/Nb Josephson junction is 0.8kA/cm^2. The results show that the NAND gate can operate at frequency up to about 25GHz, and the power consumption of this circuit is close to 0.06μW/gate.
Keyword(in Japanese)	(See Japanese page)
Keyword(in English)	Josephson junction / single flux quantum / logic circuit / NAND gate
Paper #	SCE98-40
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Conference Information
Committee	SCE
Conference Date	1999/1/27(1days)
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Paper Information
Registration To	Superconductive Electronics (SCE)
Language	JPN
Title (in Japanese)	(See Japanese page)
Sub Title (in Japanese)	(See Japanese page)
Title (in English)	Proposal of NAND gate based on SFQ logic
Sub Title (in English)
Keyword(1)	Josephson junction
Keyword(2)	single flux quantum
Keyword(3)	logic circuit
Keyword(4)	NAND gate
1st Author's Name	Seiichiro Ono
1st Author's Affiliation	Faculty of Engineering, Saitama University()
2nd Author's Name	Susumu Takada
2nd Author's Affiliation	Faculty of Engineering, Saitama University
Date	1999/1/27
Paper #	SCE98-40
Volume (vol)	vol.98
Number (no)	564
Page	pp.pp.-
#Pages	6
Date of Issue