The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
A CMOS compatible high-voltage STI DEMOS transistor is fabricated and its electrical characteristics studied. A method is used to find the breakdown voltage of this two-dimensional STI DEMOS structure theoretically. A breakdown voltage model, which relates the breakdown voltage to the effective N well doping concentration NB and the width of the accumulation region χa, is derived. The predictions...
This paper presents a loss calculation method based on the selection of IGBTs and Diodes, and on an analysis of conduction and switching losses in multilevel pulse width modulation (PWM) systems. A comparison between the Modular Multilevel Converter (MMC) and other multilevel topologies, adapted to medium voltage applications, will thus be presented in order to highlight issues such as thermal disparity...
We investigated quarter-laser-cycle oscillations in the transient absorption signal of attosecond pulse trains and infrared pulses interacting in helium. We discuss their physical origin and show their usefulness for experimental delay-zero calibration in attosecond science.
The aim of the study is to propose a new organization model of sci-tech innovation platforms for the secondary innovation resources integration to promote the development of innovative city construction, which is based on the fact that there is a positive correlation between sci-tech innovation platforms and innovative city by an empirical analysis of Fujian province.
A multifunctional lab-on-a-tube (LOT) probe for simultaneous in vivo neurochemical and electrophysiological activity measurements is presented. Developed heterostructured platinum/iridium oxide (Pt/IrOx) microelectrodes have shown a superior signal-to-noise ratio and around 80 times slower polarization rate than platinum microelectrodes with the same surface area. Oxygen and glucose biosensors have...
This study presents a novel single proof-mass 3-axis capacitive-type accelerometer design consisting of poly-Si rib-proofmass, springs, high-aspect-ratio in-plane sensing electrodes, and plate-type out-of-plane sensing electrodes. This single proof-mass accelerometer design has three merits to increase the sensitivity, (1) large area plate-type out-of-plane gap-closing sensing electrodes with differential...
This paper reports a packaged energy harvester using the novel method of micro-molding bulk electrets of polytetrafluoroethylene (PTFE). Compared with thin film electrets prepared by spin-coating method, bulk PTFE electrets are of higher trapped charge density by 1.2∼2 times, and improved charge storage stability by 1.3 times in charge retain rate over 10 days. Further, the micromolding method guarantees...
A sub-mW low-noise amplifier (LNA) is designed and implemented using a 0.18 μm CMOS standard process for wireless sensor network (WSN) applications. An important goal of the design is to achieve the low noise figure (NF) that is required in WSN receivers with low power consumption (PDC). The forward body bias technique is used to reduce power consumption of the LNA. A supply voltage of 0.6 V is used...
In the last few decades research efforts were conducted to grasp good understanding about the origin of equiaxed and columnar grains formed during solidification. The morphological evolutions such as globular/cellular to dendritic or columnar-to-equiaxed transition were generally studied. Correspondingly, some empirical models were introduced. Nevertheless, no sufficient attention was paid to incorporation...
We present and compare three different amorphous materials for robotic construction. By conforming to surfaces they are deposited on, such materials allow robots to reliably construct in unstructured terrain. However, using amorphous materials presents a challenge to robotic manipulation. We demonstrate how deposition of each material can be automated and compare their material properties, cost, and...
Macroporous polymeric microparticles have been fabricated using a combination of particulate leaching and gas foaming techniques. Controlling the concentration of ammonium bicarbonate particles and the spin speed of the microemulsion in poly (ε-caprolactone) (PCL) yields a range of macroporous microparticles with interconnected pores (10–50µm) that may promote cell and tissue ingrowth in vivo when...
This paper proposed the design of wide-area robust damping (WARD) controller for multiple Flexible AC Transmission Systems (FACTS) devices to enhance the stability of power system with considering time delay of wide-area signals. Firstly, as power systems interconnect more and more to exchange large amounts, wide-area measurement system (WAMS) is widely applied to monitor and control the interconnected...
A distributed amplifier combined with CRLH-leaky wave antennas (LWAs) for a new resonant type power recycling scheme is proposed. By connecting a closed loop to the LWA on the drain side of the distributed amplifier, we can obtain gain enhancement compared to the one directly terminated without the loop. Such enhancement fluctuates with respect to the frequency. The phenomenon will be explained theoretically...
Here we present a new microfabricated optical endoscope using a fully integrated optical waveguide with a push-pull piezoelectric actuator design. This new scanning probe was constructed using SU-8 epoxy-based photoresist as a resonant cantilever. The scanner was driven with a frequency of 25 Hz in the horizontal direction and a frequency of 4.71 kHz in the vertical direction. The best resolution...
A two-stage drain current phenomenon in saturation region, named as Id-Vd hump, has been investigated in high-voltage NMOS transistor. A parasitic BJT turn-on enhanced Id-Vd hump model is proposed and characterized by using a two-dimensional device simulation. By optimizing channel/drift-region process conditions, both parasitic BJT and impact-ionization generation can be suppressed. Both measured...
In this paper, a computer simulation of the Salient Pole Synchronous Machine (SPSM) is presented. This simulation employs a modeling based on the machine self and mutual inductance curves, determined from a methodology, not presented here. These methodology applies the experimental volt-ampere method to obtaining the inductances curves. From these inductance data, using a mathematical methodology,...
This paper presents a novel micro direct methanol fuel cell (μDMFC) integrated with passive fuel delivery based on a surface tension driving mechanism to achieve power-free fuel supply. Unidirectional methanol-to-water smooth flow is achieved through the hydrophobic capillaries of the porous silicon membrane utilizing the liquid surface tension difference between methanol and water. The prototype...
In this work, a 3–5 GHz CMOS UWB RF receiver front-end design is described. The design was realized using integrated passive device (IPD) package format as system-in-package (SiP) application. The CMOS circuit consists of a fully differential common gate-low noise amplifier (CG-LNA), an IQ downconversion mixer, and a variable gain amplifier. Three low loss IPD transformer baluns are used to convert...
A high performance 22/20nm CMOS bulk FinFET achieves the best in-class N/P Ion values of 1200/1100 μA/μm for Ioff=100nA/μm at 1V. Excellent device electrostatic control is demonstrated for gate length (Lgate) down to 20nm. Dual-Epitaxy and multiple stressors are essential to boost the device performance. Dual workfunction (WF) with an advanced High-K/Metal gate (HK/MG) stack is deployed in an integration-friendly...
A low-voltage and high-linearity downconverter RFIC design using TSMC 0.18 μm CMOS foundry for WiMAX applications is presented in this paper. The LC resonator is used to block DC and RF signals for low supply voltage and the multiple-gated CMOS is adopted to eliminate third-order nonlinear term for high linearity. The crucial simulated results of WiMAX downconverter include that a conversion gain...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.