Bit significance based reconfigurable approximate restoring dividers and square rooters. (October 2020)
- Record Type:
- Journal Article
- Title:
- Bit significance based reconfigurable approximate restoring dividers and square rooters. (October 2020)
- Main Title:
- Bit significance based reconfigurable approximate restoring dividers and square rooters
- Authors:
- Arya, Neelam
Soni, Teena
Pattanaik, Manisha
Sharma, G.K. - Abstract:
- Abstract: Approximate computing has received significant recognition for enhancing energy-efficiency in error-resilient applications. This paper proposes bit significance based reconfigurable approximate restoring dividers and square rooters for improved energy-efficiency. Configurable subtractor cells (CSCs) which can function both accurately and approximately are proposed along-with a simplified and scalable overflow detection hardware as major design units. These units are subsequently integrated to form complete divider and square rooter architectures. The CSCs are used to maneuver the input bits based on their progressive significance which affects the accuracy of the design. The proposed approximate designs have the ability to switch between the approximate and accurate operating modes making it suitable for both error-resilient and error-sensitive applications. For 16/8 division the proposed approximate divider reduces energy by 49% with normalized mean error distance of 0.45% when synthesized on CMOS 45-nm technology node. The 16-bit proposed approximate square rooter shows an energy reduction of 36% with marginal accuracy loss. Extensive simulation results of approximate designs are provided and compared with the state-of-the-art approximate designs. The effectiveness of the proposed approximate designs for image processing applications is demonstrated and evaluated.
- Is Part Of:
- Microelectronics journal. Volume 104(2020)
- Journal:
- Microelectronics journal
- Issue:
- Volume 104(2020)
- Issue Display:
- Volume 104, Issue 2020 (2020)
- Year:
- 2020
- Volume:
- 104
- Issue:
- 2020
- Issue Sort Value:
- 2020-0104-2020-0000
- Page Start:
- Page End:
- Publication Date:
- 2020-10
- Subjects:
- Approximate computing -- Restoring divider -- Energy efficiency -- Restoring square rooter -- Error-resilient applications -- Image processing -- Low power -- Reconfigurable
Microelectronics -- Periodicals
Microélectronique -- Périodiques
Microelectronics
Electronic journals
Journals - contents and abstracts
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621.3805 - Journal URLs:
- http://catalog.hathitrust.org/api/volumes/oclc/5877621.html ↗
http://www.sciencedirect.com/science/journal/00262692 ↗
http://www.intute.ac.uk/sciences/cgi-bin/fullrecord.pl?handle=lesa.1012319367 ↗
http://www.elsevier.com/journals ↗
http://www.elsevier.com/homepage/elecserv.htt ↗ - DOI:
- 10.1016/j.mejo.2020.104861 ↗
- Languages:
- English
- ISSNs:
- 0959-8324
- Deposit Type:
- Legaldeposit
- View Content:
- Available online (eLD content is only available in our Reading Rooms) ↗
- Physical Locations:
- British Library DSC - 5758.973000
British Library DSC - BLDSS-3PM
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- 14543.xml