Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 43 for “"Sub-threshold"”.
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A sub-threshold cell library and methodology
Sub-threshold operation is a compelling approach for energy-constrained applications where speed is of secondary concern, but increased sensitivity to process variation must be mitigated in this regime. With scaling of process technologies, random within-die variation has recently introduced …
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Low energy digital circuit design using sub-threshold operation
Scaling of process technologies to deep sub-micron dimensions has made power management a significant concern for circuit designers. For emerging low power applications such as distributed micro-sensor networks or medical applications, low energy operation is the primary concern instead of speed, …
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Design of low-power digital circuits in the sub-threshold domain
… circuits has increased significantly as submicron technologies scale down. Battery operated portable applications are in high demand across the industries such as automotive, medical, MEMS, telecommunication and so on. Subthreshold operations provides the potential solution to the energy …
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An energy efficient sub-threshold baseband processor architecture for pulsed ultra-wideband communications
… operating the digital baseband processor in the sub-threshold region and increasing the degree of parallelism can translate into energy savings across the entire UWB receiver. While sub-threshold operation is traditionally used for low energy, low performance applications such as wrist-watches, …
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The Efficacy of Using Color In Sub-Threshold Vibration to Improve Older Adult Balance
… measures before stimulation will differ across subjects and vary within a subject across the sessions. (2). Each vibration color would cause a change in the state different from the placebo. (3)The efficacy of utilizing subthreshold vibration to change postural sway magnitude, predictability, …
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Sub threshold high frequency electrical field stimulation effect for angiogenesis and vegf expression in cardiomyocytes and heart tissue. Remodelling in the heart: impact of mechanical stretch, threshold and sub-threshold electrical stimulation on cultivated cardiomyocytes and sympathetic neurons /
… tasks are answered: To investigate the effect of sub threshold electrical stimulation on vascular endothelial growth factor regulation in cultured neonatal rat ventricular myocytes. To evaluate the role of autoantibodies in cases of dilated cardiomyopathy, inducing the expression of vascular …
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The effects of periodic and non-periodic inputs on the dynamics of a medial entorhinal cortex layer II stellate cell model
Various neuron types exhibit sub-threshold and firing frequency resonance in which the sub-threshold membrane potential or firing frequency responses to periodic inputs peak at a preferred frequency (or frequencies). Previous experimental work has shown that medial entorhinal cortex layer II …
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Power and performance optimization of negative capacitance transistor circuits
… voltage is extremely amplified facilitating low sub-threshold slopes and enhanced drain-currents. Therefore, NCFET tremendously reduces power consumption by enabling extremely low voltage operation. Whereas the enhanced current behavior of NCFET enables extremely high-performance improvement. The …
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Cold-cavity measurement of excess optical loss in oxide-confined vertical cavity surface emitting lasers
… optical losses. A generalized method using sub-threshold spectral measurements matched to model calculations is demonstrated to determine optical loss in microcavity lasers. Cold-cavity spectral characteristics are used to extract the size dependent optical loss for small diameter …
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Crystallization of Isolated Amorphous Zones in Semiconductors
… near the crystalline/amorphous interface. In the sub-threshold electron energy regime, crystallization is thought to be initiated by an electronic excitation which creates a dangling bond pair. By migrating along the crystalline/amorphous interface these dangling bonds are capable of …
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Low Power Merged LNA and Mixer Design for Medical Implant Communication Services
… while the LNA operates in the normal super-threshold region and the mixer in the sub-threshold region. In addition, a gm-boosting technique with a capacitor cross-coupled at the LNA input stage is also adopted to achieve a low noise figure (NF) and high linearity, which is critical to the …
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Low Power Demodulator Design for RFID Applications
… in the 900 MHz range, is presented using sub-threshold design. Using this technique and working with 90 nm complementary metal-oxide-semiconductor (CMOS) technology, the circuit can operate with a supply voltage as low as 0.3 V, consuming a very small amount of power compared to other …
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System-level optimization of the DC-DC voltage regulator and core for sub/near-threshold voltage operation
… for low power embedded systems operating in near/sub-threshold region due to its high conversion ratio and compactness. However, existing optimization for SC-VRM is separated from the embedded core design and therefore leads to sub-optimal system energy efficiency. In this thesis, we propose to …
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Motion cueing in driving simulators for research applications
… various motion cueing techniques based on both subjective ratings of realism and objective measures of driver performance. Using a Just Noticeable Difference methodology, Stage 1 determined the maximum perceptible motion scaling for platform movement in both translation and tilt. Motion cues …
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Gate-all-around silicon nanowire MOSFETs : top-down fabrication and transport enhancement techniques
… channel, which has the potential to minimize threshold voltage variation due to reduced random dopant fluctuations. However, there is little known about carrier mobility in Si nanowire MOSFETs. Because of the different crystal surface orientations, the nanowire sidewalls are expected to …
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Computationally efficient characterization of standard cells for statistical static timing analysis
… that addresses intra-die variations at near-threshold to sub-threshold supply voltage, simulated on a scaled 32nm CMOS standard cell library. This technique would characterize the propagation delay and output slew of an individual cell for subsequent timing path analyses. Its efficiency stems …
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Feasibility study of trans-cranial Direct Current Stimulation in presence of Brain tumor
… to the scalp using electrodes, leading to sub-threshold changes in neuronal membrane potential. Before actual clinical stimulation is performed, such systems are validated by simulating the stimulation and the resulting current flow patterns using finite element solvers. However, the …
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Effect of MOSFET threshold voltage variation on high-performance circuits
… future CMOS technology generations, supply and threshold voltages will have to continually scale to sustain performance increase, limit energy consumption, control power dissipation, and maintain reliability. These continual scaling requirements on supply and threshold voltages pose several …
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Advanced Energy-Efficient Devices for Ultra-Low Voltage System: Materials-to-Circuits
… (CMOS) field-effect transistors (FETs) enter sub-threshold operation in the ultra-low supply voltage regime, their drive current is noticeable degraded. Therefore, new energy-efficient MOSFETs and circuit architectures must be introduced. In this work, tunnel FETs (TFETs), which operate …
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Correlation Between Computed Equilibrium Secondary Structure Free Energy and siRNA Efficiency
… correlation between ln(remaining mRNA) and ΔG<sub>ms</sub>, the combined free energy cost of unraveling the siRNA and creating the break in the mRNA secondary structure at the complementary target strand region. At the same time, the free energy change ΔG<sub>total</sub> of the entire process …
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