Presentation 2011-07-13
Nano-watt demonstration of single-flux-quantum circuits
Atsushi KITAYAMA, Masato ITO, Tomohito KOUKETSU, Tetsuya KUSUMOTO, Masamitsu TANAKA, Akira FUJIMAKI,
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Abstract(in Japanese) (See Japanese page)
Abstract(in English) We have demonstrated rapid-single-flux-quantum (RSFQ) circuits with reduced power consumptions by lowering bias voltages and critical currents. The power consumption including a power consumption of a bias resistor is measured to be around 1 nW/JJ in 8-bit shift registers, while the operating frequency ranges from 7.5 GHz to 20 GHz. we lower bias voltages applied to RSFQ circuits. The values of bias resistances are proportional to bias voltages. At lowered bias voltages, the power consumption of the bias resistor is reduced. When a voltage begins to be generated at a Josephson junction, the net current provided to the junction and to the shunt resistor is decreased. As a result, the magnitude of the voltage is suppressed, and the power consumption of the shunt resistor is reduced. The power energy-delay product is about 70 times smaller and the the energy-delay product is more than 13 times smaller than that of the conventional RSFQ circuits. Low poewer SFQ circuits are superior in terms of energy-delay product to semiconductor circuits though the power consumption of SFQ cicuits contains the refrigerating machine.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) Single-flux-quantum circuit / Low power consumption / Shift register
Paper # SCE2011-10
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Conference Information
Committee SCE
Conference Date 2011/7/6(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) Nano-watt demonstration of single-flux-quantum circuits
Sub Title (in English)
Keyword(1) Single-flux-quantum circuit
Keyword(2) Low power consumption
Keyword(3) Shift register
1st Author's Name Atsushi KITAYAMA
1st Author's Affiliation Nagoya University()
2nd Author's Name Masato ITO
2nd Author's Affiliation Nagoya University
3rd Author's Name Tomohito KOUKETSU
3rd Author's Affiliation Nagoya University
4th Author's Name Tetsuya KUSUMOTO
4th Author's Affiliation Nagoya University
5th Author's Name Masamitsu TANAKA
5th Author's Affiliation Nagoya University
6th Author's Name Akira FUJIMAKI
6th Author's Affiliation Nagoya University
Date 2011-07-13
Paper # SCE2011-10
Volume (vol) vol.111
Number (no) 130
Page pp.pp.-
#Pages 6
Date of Issue