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Showing 2 results for Flip-Flop
Proposing Very Low Power Three-Valued Flip-Flops by Using CNTFET Transistors
Amirhossein Salimi, Behzad Ebrahimi, Massoud Dousti,
Volume 20, Issue 1 (3-2024)
Abstract
The scaling limitations of Complementary Metal-Oxide-Semiconductor (CMOS) transistors to achieve better performance have led to the attention of other structures to improve circuit performance. One of these structures is multi-valued circuits. In this paper, we will first study Carbon Nanotube Transistors (CNT). CNT transistors offer a viable means to implement multi-valued logic due to their variable and controllable threshold voltage. Subsequently, we delve into the realm of three-valued flip-flop circuits, which find extensive utility in digital electronics. Leveraging the insights gained from our analysis, we propose a novel D-type flip-flop structure. The presented structure boasts a remarkably low power consumption, showcasing a reduction exceeding 61% compared to other existing structures. Furthermore, the proposed circuit incorporates a reduced number of transistors, resulting in a reduced footprint. Importantly, this circuit exhibits negligible static power consumption in generating intermediate values, rendering it robust against process variations.  Overall, the proposed circuits demonstrate a 29.7% increase in delay compared to the compared structures. However, they showcase a 96.1% reduction in power-delay product (PDP) compared to the other structures. The number of transistors is also 8.3% less than other structures. Additionally, their figure of merits (FOM) are 19.7% better than the best-compared circuit, underscoring its advantages in power efficiency, chip area, and performance.
NCFET based, Non-Volatile and Radiation-Hardened Flip Flop with Simultaneous Backup Capability for Non-volatile/ Normally-Off Computing
Vahid Jamshidi, Mohammad Mehdi Bordbar,
Volume 20, Issue 2 (6-2024)
Abstract
Nonvolatile computing have been shown to be effective in the face of the sudden power outage for wireless sensor networks, Internet-of-Things applications, data converters, and emerging energy-harvesting circuits. It also plays a significant role in power-gating to minimize the leakage power for improving the energy efficiency. However, using on-chip backup module for D flip–flop has a bottleneck, and result in an increase in total power consumption, occupied area, and reduced calculation speed. Furthermore, the backup module needs external control signals, which increases the complexity of the circuit. This paper proposes a novel nonvolatile flip-flop with simultaneous data backup capability, which uses NCFET ferroelectric transistor to fundamentally advance the non-volatile computing paradigm. Proposed NVFF exhibits 0.8% faster and 5.0% smaller energy than previous works, while uniquely providing Radiation-Hardened feature.
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Creative Commons License
© 2022 by the authors. Licensee IUST, Tehran, Iran. This is an open access journal distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) license.