The search functionality is under construction.
The search functionality is under construction.

Nonvolatile Storage Cells Using FiCC for IoT Processors with Intermittent Operations

Yuki ABE, Kazutoshi KOBAYASHI, Jun SHIOMI, Hiroyuki OCHI

  • Full Text Views

    3

  • Cite this

Summary :

Energy harvesting has been widely investigated as a potential solution to supply power for Internet of Things (IoT) devices. Computing devices must operate intermittently rather than continuously, because harvested energy is unstable and some of IoT applications can be periodic. Therefore, processors for IoT devices with intermittent operation must feature a hibernation mode with zero-standby-power in addition to energy-efficient normal mode. In this paper, we describe the layout design and measurement results of a nonvolatile standard cell memory (NV-SCM) and nonvolatile flip-flops (NV-FF) with a nonvolatile memory using Fishbone-in-Cage Capacitor (FiCC) suitable for IoT processors with intermittent operations. They can be fabricated in any conventional CMOS process without any additional mask. NV-SCM and NV-FF are fabricated in a 180nm CMOS process technology. The area overhead by nonvolatility of a bit cell are 74% in NV-SCM and 29% in NV-FF, respectively. We confirmed full functionality of the NV-SCM and NV-FF. The nonvolatile system using proposed NV-SCM and NV-FF can reduce the energy consumption by 24.3% compared to the volatile system when hibernation/normal operation time ratio is 500 as shown in the simulation.

Publication
IEICE TRANSACTIONS on Electronics Vol.E106-C No.10 pp.546-555
Publication Date
2023/10/01
Publicized
2023/04/13
Online ISSN
1745-1353
DOI
10.1587/transele.2022CTP0001
Type of Manuscript
Special Section PAPER (Special Section on Analog Circuits and Their Application Technologies)
Category

Authors

Yuki ABE
  Kyoto Institute of Technology
Kazutoshi KOBAYASHI
  Kyoto Institute of Technology
Jun SHIOMI
  Osaka University
Hiroyuki OCHI
  Ritsumeikan University

Keyword