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Offset-Cancellation Sensing-Circuit-Based Nonvolatile Flip-Flop Operating in Near-Threshold Voltage Region.
- Source :
-
IEEE Transactions on Circuits & Systems. Part I: Regular Papers . Aug2019, Vol. 66 Issue 8, p2963-2972. 10p. - Publication Year :
- 2019
-
Abstract
- For ultra-low-power Internet of Things (IoT) devices powered by batteries or energy harvesting, a nonvolatile flip-flop (NV-FF) operating in the near-threshold voltage (NTV) region has been widely studied to save both standby and active power. However, in the NTV region, the NV-FF suffers from restore yield and performance degradation due to the increase in process variation combined with the decrease in supply voltage. This paper presents a comparative analysis of the previous NV-FFs according to supply voltage scaling and suggests the design directions for implementing the NV-FF that can operate with compact area and high performance even in the NTV region. Through the comparative analysis, a novel offset-cancellation sensing-circuit (OCSC)-based NV-FF, which adopts a separate latch and sensing circuit structure and an offset-cancellation technique, is proposed. The Monte Carlo HSPICE simulation results using industry-compatible 65-nm model parameters show that the proposed NV-FF satisfies a target restore yield with 32% area, 88% speed, and 82% energy savings in comparison with a representative NV-FF of the merged latch and sensing circuit structure. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 15498328
- Volume :
- 66
- Issue :
- 8
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Circuits & Systems. Part I: Regular Papers
- Publication Type :
- Periodical
- Accession number :
- 137378127
- Full Text :
- https://doi.org/10.1109/TCSI.2019.2913009