A low cost individual-well adaptive body bias (IWABB) scheme for leakage power reduction and performance enhancement in the presence of intra-die variations

2004 ◽  
Author(s):  
T.W. Chen ◽  
J. Gregg
Keyword(s):  
Performance Enhancement ◽  
Low Cost ◽  
Power Reduction ◽  
Leakage Power ◽  
And Performance ◽  
Adaptive Body Bias ◽  
Body Bias

scholarly journals Monotonic transition based forward body bias for dual threshold voltage low power embedded processors

2006 ◽  
Vol 4 ◽  
pp. 269-273
Author(s):  
S. Jayapal ◽  
Y. Manoli
Keyword(s):  
Threshold Voltage ◽  
Leakage Power ◽  
High Threshold ◽  
Process Technology ◽  
Circuit Performance ◽  
Fine Grained ◽  
Dual Threshold Voltage ◽  
And Performance ◽  
Forward Body Bias ◽  
Body Bias

Abstract. Dual threshold voltage and forward body bias techniques are effective ways to optimally balance the standby leakage power and performance. In this paper, we propose a novel fine-grained forward body biasing scheme for monotonic static logic circuits. In the proposed scheme, the forward body bias is applied to high threshold voltage of either the pull-up or the pull-down network based on the evaluation transition and the state of operation. This technique improves the low skew NAND and NOR circuit performance by 7% and 11%, high skew NAND and NOR by 8% and 13% respectively. It reduces both active and standby leakage power as compared to monotonic static CMOS with dual-VT technique. The simulations are carried out using 130 nm mixed mode process technology to validate our proposed technique.

scholarly journals Interpenetrating interfaces for efficient perovskite solar cells with high operational stability and mechanical robustness

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Qingshun Dong ◽  
Chao Zhu ◽  
Min Chen ◽  
Chen Jiang ◽  
Jingya Guo ◽  
...  
Keyword(s):  
Solar Cells ◽  
Tin Dioxide ◽  
High Efficiency ◽  
Performance Enhancement ◽  
Low Cost ◽  
Perovskite Solar Cells ◽  
Operational Stability ◽  
Perovskite Layer ◽  
Mechanical Bending ◽  
And Performance

AbstractThe perovskite solar cell has emerged rapidly in the field of photovoltaics as it combines the merits of low cost, high efficiency, and excellent mechanical flexibility for versatile applications. However, there are significant concerns regarding its operational stability and mechanical robustness. Most of the previously reported approaches to address these concerns entail separate engineering of perovskite and charge-transporting layers. Herein we present a holistic design of perovskite and charge-transporting layers by synthesizing an interpenetrating perovskite/electron-transporting-layer interface. This interface is reaction-formed between a tin dioxide layer containing excess organic halide and a perovskite layer containing excess lead halide. Perovskite solar cells with such interfaces deliver efficiencies up to 22.2% and 20.1% for rigid and flexible versions, respectively. Long-term (1000 h) operational stability is demonstrated and the flexible devices show high endurance against mechanical-bending (2500 cycles) fatigue. Mechanistic insights into the relationship between the interpenetrating interface structure and performance enhancement are provided based on comprehensive, advanced, microscopic characterizations. This study highlights interface integrity as an important factor for designing efficient, operationally-stable, and mechanically-robust solar cells.

scholarly journals Intersystem Bias in GPS, GLONASS, Galileo, BDS-3, and BDS-2 Integrated SPP: Characteristics and Performance Enhancement as a Priori Constraints

2021 ◽  
Vol 13 (22) ◽  
pp. 4650
Author(s):  
Lin Pan ◽  
Zhehao Zhang ◽  
Wenkun Yu ◽  
Wujiao Dai
Keyword(s):  
Performance Enhancement ◽  
Low Cost ◽  
Single Point ◽  
A Priori ◽  
Global Navigation Satellite Systems ◽  
Satellite Systems ◽  
Term Stability ◽  
Long Term Stability ◽  
And Performance ◽  
Global Navigation Satellite

Global navigation satellite systems (GNSSs) have been booming in recent years, and the space segment of all four of the GNSSs, including BDS (BDS-3/BDS-2), Galileo, GPS, and GLONASS, has almost been fully deployed at present. The single point positioning (SPP) technology, which is widely used in satellite navigation and low-accuracy positioning, can benefit from the multi-GNSS integration, but the additional intersystem bias (ISB) parameters should be introduced to ensure the compatibility among different GNSSs. In this study, the ISB estimates derived from four-system integrated SPP are carefully characterized, and the performance enhancement attributed to a priori ISB constraints by prediction for position solutions under open sky and constrained visibility environments is rigorously evaluated. The results indicate that the ISB between BDS-3 and BDS-2 cannot be ignored. The daily ISBs show step changes when encountering the replacement of receiver types, while it is not the case for the receiver firmware versions. The daily ISBs are roughly consistent for the stations equipped with the same type of receivers. The short-term stability of epochwise ISBs for GLONASS, Galileo, BDS-2, and BDS-3 with respect to GPS can be 2.335, 1.262, 1.741, and 1.532 ns, respectively, whereas the corresponding long-term stability for daily ISBs can be 1.258, 1.288, 2.713, and 2.566 ns, respectively. The single-day prediction accuracy of daily ISBs for GLONASS, Galileo, BDS-2, and BDS-3 with respect to GPS can be 1.055, 0.640, 1.242, and 0.849 ns, respectively. The improvements on positioning accuracy after introducing a priori ISB constraints can be over 20% at an elevation mask of 40° and 50° with a time span of ISB prediction of a day. As to the availability, it is only 64.0% for traditional four-system SPP under a cutoff elevation of 50°, while the corresponding availability is increased to approximately 90.0% after considering a priori ISB constraints. For completeness, the characteristics of ISBs estimated with the low-cost u-blox M8T receiver and the Xiaomi Mi8 smartphone as well as the contribution of a priori ISB constraints to the multisystem SPP solutions with these devices are also investigated.

scholarly journals Leakage power reduction using the body bias and pin reordering technique

2016 ◽  
Vol 13 (3) ◽  
pp. 20151052-20151052 ◽  
Author(s):  
Jae Woong Chun ◽  
Chien-Yi Roger Chen
Keyword(s):  
Power Reduction ◽  
Leakage Power ◽  
The Body ◽  
Body Bias
Sign in / Sign up

Export Citation Format

Share Document