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Paper Abstract and Keywords
Presentation 2012-07-19 10:20
Design and Demonstrate of DC-Powered On-Chip AC Power Sources for Adiabatic Quantum-Flux-Parametron
Takashi Mukaiyama, Yuki Yamanashi, Nobuyuki Yoshikawa (Yokohama National Univ.) SCE2012-9 Link to ES Tech. Rep. Archives: SCE2012-9
Abstract (in Japanese) (See Japanese page) 
(in English) Abstract Adiabatic quantum-flux-parametron (AQFP) circuits are a promising technology as ultra-low-power logic because their energy consumption is reduced considerably by operating them adiabatically. The AQFP circuits are driven by an AC current source that periodically applies and removes their bias current. However, if external sources are used for supplying the AC bias at high-frequency, on-chip passive network will be larger and the AC bias dissipation at the interconnection becomes higher. In this study, we propose on-chip AC power sources operated by DC power sources. The proposed AC power source is composed of a superconducting resonator and a DC-powered Josephson relaxation oscillator which is coupled to the resonator. It converts DC current into AC current and supplies the AC current magnetically to AQFP circuits coupled to the resonator. We designed and implemented the AC power source, whose target frequency is 4.8 GHz, by using the ISTEC Nb standard process. Simulation results show that its power consumption is a few $mu$W and its correct operation was experimentally demonstrated, where the AC output current amplitude can be varied from 1 mA to 8 mA by its DC input current. These results indicate that AQFP circuits can be driven by external DC power sources using the on-chip AC power sources.
Keyword (in Japanese) (See Japanese page) 
(in English) superconducting circuits / Josephson integrated circuits / AC source / relaxation oscillator / QFP / / /  
Reference Info. IEICE Tech. Rep., vol. 112, no. 138, SCE2012-9, pp. 1-6, July 2012.
Paper # SCE2012-9 
Date of Issue 2012-07-12 (SCE) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
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Download PDF SCE2012-9 Link to ES Tech. Rep. Archives: SCE2012-9

Conference Information
Committee SCE  
Conference Date 2012-07-19 - 2012-07-19 
Place (in Japanese) (See Japanese page) 
Place (in English) Kikai-Shinko-Kaikan Bldg. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Signal processing technologies and their applications, etc. 
Paper Information
Registration To SCE 
Conference Code 2012-07-SCE 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Design and Demonstrate of DC-Powered On-Chip AC Power Sources for Adiabatic Quantum-Flux-Parametron 
Sub Title (in English)  
Keyword(1) superconducting circuits  
Keyword(2) Josephson integrated circuits  
Keyword(3) AC source  
Keyword(4) relaxation oscillator  
Keyword(5) QFP  
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Keyword(8)  
1st Author's Name Takashi Mukaiyama  
1st Author's Affiliation Yokohama National University (Yokohama National Univ.)
2nd Author's Name Yuki Yamanashi  
2nd Author's Affiliation Yokohama National University (Yokohama National Univ.)
3rd Author's Name Nobuyuki Yoshikawa  
3rd Author's Affiliation Yokohama National University (Yokohama National Univ.)
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Speaker Author-1 
Date Time 2012-07-19 10:20:00 
Presentation Time 25 minutes 
Registration for SCE 
Paper # SCE2012-9 
Volume (vol) vol.112 
Number (no) no.138 
Page pp.1-6 
#Pages
Date of Issue 2012-07-12 (SCE) 


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