Dual mode ferroelectric transistor based non-volatile flip-flops for intermittently-powered systems

S. K. Thirumala, A. Raha, H. Jayakumar, K. Ma, Vijaykrishnan Narayanan, V. Raghunathan, Sumeet Kumar Gupta

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

In this work, we propose dual mode ferroelectric transistors (D-FEFETs) that exhibit dynamic tuning of operation between volatile and non-volatile modes with the help of a control signal. We utilize the unique features of D-FEFET to design two variants of non-volatile flip-flops (NVFFs). In both designs, D-FEFETs are operated in the volatile mode for normal operations and in the non-volatile mode to backup the state of the flip-flop during a power outage. The first design comprises of a truly embedded non-volatile element (D-FEFET) which enables a fully automatic backup operation. In the second design, we introduce need-based backup, which lowers energy during normal operation at the cost of area with respect to the first design. Compared to a previously proposed FEFET based NVFF, the first design achieves 19% area reduction along with 96% lower backup energy and 9% lower restore energy, but at 14%-35% larger operation energy. The second design shows 11% lower area, 21% lower backup energy, 16% decrease in backup delay and similar operation energy but with a penalty of 17% and 19% in the restore energy and delay, respectively. System-level analysis of the proposed NVFFs in context of a state-of-the-art intermittently-powered system using real benchmarks yielded 5%-33% energy savings.

Original languageEnglish (US)
Title of host publicationISLPED 2018 - Proceedings of the 2018 International Symposium on Low Power Electronics and Design
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Print)9781450357043
DOIs
StatePublished - Jul 23 2018
Event23rd IEEE/ACM International Symposium on Low Power Electronics and Design, ISLPED 2018 - Bellevue, United States
Duration: Jul 23 2018Jul 25 2018

Publication series

NameProceedings of the International Symposium on Low Power Electronics and Design
ISSN (Print)1533-4678

Other

Other23rd IEEE/ACM International Symposium on Low Power Electronics and Design, ISLPED 2018
CountryUnited States
CityBellevue
Period7/23/187/25/18

Fingerprint

Flip flop circuits
Ferroelectric materials
Transistors
Outages
Energy conservation
Automation
Tuning

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Thirumala, S. K., Raha, A., Jayakumar, H., Ma, K., Narayanan, V., Raghunathan, V., & Gupta, S. K. (2018). Dual mode ferroelectric transistor based non-volatile flip-flops for intermittently-powered systems. In ISLPED 2018 - Proceedings of the 2018 International Symposium on Low Power Electronics and Design [a31] (Proceedings of the International Symposium on Low Power Electronics and Design). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1145/3218603.3218653
Thirumala, S. K. ; Raha, A. ; Jayakumar, H. ; Ma, K. ; Narayanan, Vijaykrishnan ; Raghunathan, V. ; Gupta, Sumeet Kumar. / Dual mode ferroelectric transistor based non-volatile flip-flops for intermittently-powered systems. ISLPED 2018 - Proceedings of the 2018 International Symposium on Low Power Electronics and Design. Institute of Electrical and Electronics Engineers Inc., 2018. (Proceedings of the International Symposium on Low Power Electronics and Design).
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title = "Dual mode ferroelectric transistor based non-volatile flip-flops for intermittently-powered systems",
abstract = "In this work, we propose dual mode ferroelectric transistors (D-FEFETs) that exhibit dynamic tuning of operation between volatile and non-volatile modes with the help of a control signal. We utilize the unique features of D-FEFET to design two variants of non-volatile flip-flops (NVFFs). In both designs, D-FEFETs are operated in the volatile mode for normal operations and in the non-volatile mode to backup the state of the flip-flop during a power outage. The first design comprises of a truly embedded non-volatile element (D-FEFET) which enables a fully automatic backup operation. In the second design, we introduce need-based backup, which lowers energy during normal operation at the cost of area with respect to the first design. Compared to a previously proposed FEFET based NVFF, the first design achieves 19{\%} area reduction along with 96{\%} lower backup energy and 9{\%} lower restore energy, but at 14{\%}-35{\%} larger operation energy. The second design shows 11{\%} lower area, 21{\%} lower backup energy, 16{\%} decrease in backup delay and similar operation energy but with a penalty of 17{\%} and 19{\%} in the restore energy and delay, respectively. System-level analysis of the proposed NVFFs in context of a state-of-the-art intermittently-powered system using real benchmarks yielded 5{\%}-33{\%} energy savings.",
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Thirumala, SK, Raha, A, Jayakumar, H, Ma, K, Narayanan, V, Raghunathan, V & Gupta, SK 2018, Dual mode ferroelectric transistor based non-volatile flip-flops for intermittently-powered systems. in ISLPED 2018 - Proceedings of the 2018 International Symposium on Low Power Electronics and Design., a31, Proceedings of the International Symposium on Low Power Electronics and Design, Institute of Electrical and Electronics Engineers Inc., 23rd IEEE/ACM International Symposium on Low Power Electronics and Design, ISLPED 2018, Bellevue, United States, 7/23/18. https://doi.org/10.1145/3218603.3218653

Dual mode ferroelectric transistor based non-volatile flip-flops for intermittently-powered systems. / Thirumala, S. K.; Raha, A.; Jayakumar, H.; Ma, K.; Narayanan, Vijaykrishnan; Raghunathan, V.; Gupta, Sumeet Kumar.

ISLPED 2018 - Proceedings of the 2018 International Symposium on Low Power Electronics and Design. Institute of Electrical and Electronics Engineers Inc., 2018. a31 (Proceedings of the International Symposium on Low Power Electronics and Design).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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AB - In this work, we propose dual mode ferroelectric transistors (D-FEFETs) that exhibit dynamic tuning of operation between volatile and non-volatile modes with the help of a control signal. We utilize the unique features of D-FEFET to design two variants of non-volatile flip-flops (NVFFs). In both designs, D-FEFETs are operated in the volatile mode for normal operations and in the non-volatile mode to backup the state of the flip-flop during a power outage. The first design comprises of a truly embedded non-volatile element (D-FEFET) which enables a fully automatic backup operation. In the second design, we introduce need-based backup, which lowers energy during normal operation at the cost of area with respect to the first design. Compared to a previously proposed FEFET based NVFF, the first design achieves 19% area reduction along with 96% lower backup energy and 9% lower restore energy, but at 14%-35% larger operation energy. The second design shows 11% lower area, 21% lower backup energy, 16% decrease in backup delay and similar operation energy but with a penalty of 17% and 19% in the restore energy and delay, respectively. System-level analysis of the proposed NVFFs in context of a state-of-the-art intermittently-powered system using real benchmarks yielded 5%-33% energy savings.

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Thirumala SK, Raha A, Jayakumar H, Ma K, Narayanan V, Raghunathan V et al. Dual mode ferroelectric transistor based non-volatile flip-flops for intermittently-powered systems. In ISLPED 2018 - Proceedings of the 2018 International Symposium on Low Power Electronics and Design. Institute of Electrical and Electronics Engineers Inc. 2018. a31. (Proceedings of the International Symposium on Low Power Electronics and Design). https://doi.org/10.1145/3218603.3218653