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Paper Abstract and Keywords
Presentation 2014-06-12 11:40
Body bias control of low-power reconfigurable accelerator CMA-SOTB
Yu Fujita, Hongliang Su, Hideharu Amano (Keio univ.) RECONF2014-8
Abstract (in Japanese) (See Japanese page) 
(in English) For low power yet high performance processing in battery driven devices, a coarse grained reconfigurable accelerator called Cool Mega Array (CMA)-SOTB is implemented by using Silicon on Thin BOX (SOTB), a new process technology developed by the Low-power Electronics Association & Project (LEAP). A real chip using a 65nm experimental process achieved a sustained performance of 192MOPS with a power supply of 0.4V and power consumption of 1.7mW. A clock frequency of 89MHz was achieved with a power supply of just 0.4V when a forward bias voltage was given. When using a reverse bias, the leakage current could be suppressed to less than 20μW in the stand-by mode. The key concept of CMA-SOTB is maintaining a balance between performance and leakage current by independently controlling the bias voltages of the PE array and the microcontroller. Evaluations of the operational frequency and power consumption of filter application programs shed light on how to find the combination of bias voltages that achieves the best energy efficiency for a required performance. The range of advantageous power supply voltage for a required performance considering the body bias was also found.
Keyword (in Japanese) (See Japanese page) 
(in English) body bias control / reconfigurable accelerator / / / / / /  
Reference Info. IEICE Tech. Rep., vol. 114, no. 75, RECONF2014-8, pp. 37-42, June 2014.
Paper # RECONF2014-8 
Date of Issue 2014-06-04 (RECONF) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF RECONF2014-8

Conference Information
Committee RECONF  
Conference Date 2014-06-11 - 2014-06-12 
Place (in Japanese) (See Japanese page) 
Place (in English) Katahira Sakura Hall 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Reconfigurable Systems, etc. 
Paper Information
Registration To RECONF 
Conference Code 2014-06-RECONF 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Body bias control of low-power reconfigurable accelerator CMA-SOTB 
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Keyword(1) body bias control  
Keyword(2) reconfigurable accelerator  
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1st Author's Name Yu Fujita  
1st Author's Affiliation Keio University (Keio univ.)
2nd Author's Name Hongliang Su  
2nd Author's Affiliation Keio University (Keio univ.)
3rd Author's Name Hideharu Amano  
3rd Author's Affiliation Keio University (Keio univ.)
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Speaker Author-1 
Date Time 2014-06-12 11:40:00 
Presentation Time 25 minutes 
Registration for RECONF 
Paper # RECONF2014-8 
Volume (vol) vol.114 
Number (no) no.75 
Page pp.37-42 
#Pages 6 
Date of Issue 2014-06-04 (RECONF) 

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