A compact model for SiC Power MOSFETs is presented. The features a physical description of the channel current and internal capacitances has been validated dc, CV, switching characteristics with measured data from 1200-V, 20-A power MOSFET in temperature range 25°C to 225°C. peculiar variation on-state resistance also demonstrated through measurements accounted developed model. In order improve user experience model, new datasheet driven parameter extraction strategy presented which requires...

This work describes the development of an integrated biosensor based on phototransistor circuits (IC) for use in medical detection, DNA diagnostics, and gene mapping. The evaluation various system components developed microchip is discussed. Methods to develop a microarray probes nitrocellulose substrate are biochip device has sensors, amplifiers, discriminators, logic circuitry board. Integration light-emitting diodes into also possible. To achieve improved sensitivity, we have designed IC...

Vertically aligned carbon nanofiber (VACNF) electrode arrays were tested for their potential application in recording neuro-electrophysiological activity. We report, the first time, stimulation and extracellular of spontaneous evoked neuroelectrical activity organotypic hippocampal slice cultures with ultramicroelectrode VACNF arrays. Because electrodes are carbon-based, these have advantages over metal could enable a variety future applications as precise, informative, biocompatible neural...

A disruption mitigation system (DMS) is under design for ITER to inject sufficient material deeply into the plasma rapid thermal shutdown and collisional suppression of any resulting runaway electrons. Progress on development both a shattered pellet injector (SPI) that produces large solid cryogenic pellets provide reliable deep penetration fast opening high flow rate gas valve massive injection (MGI) presented. Cryogenic deuterium neon up 25 mm in size have been formed accelerated with...

A wide range of industry and scientific applications require continuous measurement granular or liquid material levels. For environmental science, these include snow depth, water level, soil erosion measurements. The modern market offers many different sensors, some which can be used for measurements, but them are expensive not autonomous. Current models also propose difficulties in organizing scalable campaigns limit coverage large areas. example, common depth level sensors ultrasonic,...

A wireless power transfer system using an inductive link has been demonstrated for implantable sensor applications. The is composed of two primary blocks: unit and a backward data communication unit. performs functions: coupling the required from supply enabling battery-less, long-term implant operation providing transmission path. transmits to outside reader FSK modulation scheme via link. To demonstrate link, board-level design implemented with high efficiency. Test results fabricated...

Shattered pellet injection (SPI) has been selected as the baseline technology for disruption mitigation (DM) system ITER. Typical SPI utilizes cryogenic cooling to desublimate low pressure (<100 mbar) gases onto a cold zone within pipe gun barrel, forming cylindrical pellet. Pellets are dislodged from barrel and accelerated using either gas driven mechanical punch or high-pressure light-gas delivered by fast-opening valve. developed at Oak Ridge National Laboratory is currently deployed...

Carbon nanofiber electrode architectures are used to provide for long-term, neuroelectroanalytical measurements of the dynamic processes intercellular communication between excitable cells. Individually addressed, vertically aligned carbon nanofibers incorporated into multielement arrays upon which cell matrixes both neuronal-like derived lines (rat pheochromocytoma, PC-12) and primary cells (dissociated from embryonic rat hippocampus) cultured over extended periods (days weeks). Electrode...

Abstract Studies have been performed on the release mechanism for large pellets using high pressure gas in a shattered pellet injector. Typically, are dislodged from cryogenic surface and accelerated down barrel delivered by fast-acting propellant valve. The impact an angled which shatters into many small fragments before entering plasma. This technique was initially demonstrated DIII-D (Commaux et al 2016 Nucl. Fusion 56 046007) is now deployed JET, KSTAR, ASDEX-Upgrade, other tokamaks...

This paper presents the testing results of an all-silicon carbide (SiC) intelligent power module (IPM) for use in future high-density electronics applications. The IPM has high-temperature capability and contains both SiC devices gate driver integrated circuits (ICs). ICs allows them to be packaged into located physically close devices. provides a distinct advantage by reducing loop inductance, which promotes high-frequency operation, while also overall volume system through higher levels...

An adenine-functionalized polythiophene is synthesized <italic>via</italic> direct arylation polymerization using Boc-protection to overcome catalyst deactivation. The resulting copolymer highly soluble and shows reversible fluorescence quenching.

Several methods are presented for realizing photodiodes with independent spectral responses in a standard CMOS integrated circuit process. Only the masks, materials, and fabrication steps inherent to this process were used. The of controlled by (1) using SiO/sub 2/ polycrystalline Si as thin-film optical filters, (2) different junction depths, (3) controlling density interfacial trapping centers choosing which oxide forms Si/SiO/sub interface. Also is an example method constructing...

One strategy for assessing efficacy of a liver transplant is to monitor perfusion and oxygenation after transplantation.An implantable optical sensor being developed overcome inadequacies current monitoring approaches.To facilitate design while minimizing animal use, polydimethylsiloxane (PDMS)-based phantom was mimic the properties porcine in 630-1000 nm wavelength range anatomical geometry parenchyma.Using soft lithography construct microfluidic channels pigmented elastomer enabled 2D...

A limited number of techniques are employed in clinical medicine for regional tissue perfusion assessment. These methods marginally effective and not well suited implantation due to the inability miniaturize associated technologies. Consequently, no standardized exist real-time, continuous monitoring organ following transplantation. In this paper, a brief overview relevant assessment is given with particular emphasis on post-surgical transplanted organs. The ideal characteristics system...

Photoplethysmography (PPG) is a non-invasive optical method that can be used to detect blood volume changes in the microvascular bed of tissue.The PPG signal comprises two components; pulsatile waveform (AC) attributed interrogated with each heartbeat, and slowly varying baseline (DC) combining low frequency fluctuations mainly due respiration sympathetic nervous system activity.In this report, we investigate AC pulse for ultimate use extracting information regarding biomechanical properties...

Creating new building blocks for donor–acceptor conjugated systems is an important task continued development of materials organic electronics.

The design and test of the first undervoltage lock-out circuit implemented in a low-voltage 4H silicon carbide process capable single-chip integration with power MOSFETs is presented. circuit, block protection circuitry gate driver topology designed for use plug-in hybrid vehicle charger, was demonstrated to have rise/fall times compatible MOSFET switching speed 250 kHz while operating over targeted temperature range between 0°C 200°C. Captured data show be functional from -55°C 300°C. results

A custom CMOS analog to digital converter was designed and a prototype 8-channel ADC ASIC fabricated in 1.2 /spl mu/m process. The circuit uses Wilkinson-type architecture which is suitable for use multi-channel applications such as the PHENIX detector. design features include differential positive-ECL input high speed clock selectable control 11 or 12-bit conversions making it multiple subsystems. Circuit topologies layout specifics, including power consumption, maximum speed, INL, DNL are...

A wavelet-based signal processing technique was employed to improve an implantable blood perfusion monitoring system. Data acquired from both in vitro and vivo sources: a model the proximal jejunum of adult pig. Results showed that wavelet analysis could isolate signals raw, periodic, data as well fast Fourier transform (FFT) methods. However, for quasi-periodic segments, provided more consistent results than FFT segments 50, 10, 5 s length. Wavelet has thus been shown require less points...

This paper describes recent fast-neutron imaging measurements of the fieldable nuclear materials identification system (FNMIS) under development by Oak Ridge National Laboratory with Nuclear Security Administration (NNSA-NA-22) support for possible future use in arms control and nonproliferation applications. presents initial performed at a Thermo Fisher API 120 DT generator module FNMIS. 1 manuscript has been authored Laboratory, managed UT-Battelle LLC contract no. DE-AC05-00OR22725 US...

High-aspect-ratio vertically aligned carbon nanofibers are functionally transferred from a growth substrate suitable for high-temperature processing to with electronic functionality. Nanofiber arrays partially embedded within polymer membrane that is then separated the and new provides electrical interfacing discrete nanofiber elements (see figure).

In an effort to develop implantable optical perfusion and oxygenation sensor, based on multiwavelength reflectance pulse oximetry, we investigate the effect of source-detector separation other sourcedetector characteristics optimize sensor's signal background ratio using Monte Carlo (MC) simulations in vitro phantom studies.Separations range 0.45 1.25 mm were found be optimal case a point source.The numerical aperture (NA) source had no collected while widening spatial profile caused shift...

Liver transplants have their highest technical failure rate in the first two weeks following surgery. Currently, there are limited devices for continuous, real-time monitoring of graft. In this work, a three wavelengths system is presented that combines near-infrared spectroscopy and photoplethysmography with processing method can uniquely measure separate venous arterial oxygen contributions. This strategy allows quantification tissue consumption used to study hepatic metabolic activity...