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Two Flavors of 4kb Standard-Cell Based Subvt Memory in 65 nm CMOS
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- Andersson, Oskar (author)
- Lund University,Lunds universitet,Institutionen för elektro- och informationsteknik,Institutioner vid LTH,Lunds Tekniska Högskola,Department of Electrical and Information Technology,Departments at LTH,Faculty of Engineering, LTH
- Meinerzhagen, Pascal (author)
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- Mohammadi, Babak (author)
- Lund University,Lunds universitet,Institutionen för elektro- och informationsteknik,Institutioner vid LTH,Lunds Tekniska Högskola,Department of Electrical and Information Technology,Departments at LTH,Faculty of Engineering, LTH
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- Burg, Andreas (author)
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- (creator_code:org_t)
- 2013
- 2013
- English.
- Conference paper (other academic/artistic)
Abstract
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- Ultra-low power (ULP) biomedical implants and sensor nodes typically require small memories of a few kb, while previous work on reliable subthreshold (sub-VT) memories targets several hundreds of kb. Standard-cell based memories (SCMs) are a straightforward approach to realize robust sub- VT storage arrays and fill the gap of missing sub-VT memory compilers. This paper presents an ultra-low-leakage 4kb SCM manufactured in 65nm CMOS technology. To minimize leakage power during standby, a single custom-designed standard-cell (D- latch with 3-state output buffer) addressing all major leakage contributors of SCMs is seamlessly integrated into the fully automated SCM compilation flow. Silicon measurements of a 4kb SCM indicate a leakage power of 500fW per stored bit (at a data-retention voltage of 220mV) and a total energy of 14fJ per accessed bit (at energy-minimum voltage of 500mV), corresponding to the lowest values in 65 nm CMOS reported to date.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)
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