scholarly journals A Bootstrap Structure Directly Charged by BUS Voltage with Threshold-Based Digital Control for High-Speed Buck Converter

Electronics ◽  
2021 ◽  
Vol 10 (22) ◽  
pp. 2863
Author(s):  
Yujie Guo ◽  
Fang Yuan ◽  
Yukuan Chang ◽  
Yuxia Kou ◽  
Xu Zhang
Keyword(s):  
Data Storage ◽  
Digital Control ◽  
High Speed ◽  
New Technologies ◽  
Vital Role ◽  
Buck Converter ◽  
Chip Area ◽  
Wide Range ◽  
Bus Voltage ◽  
Area Efficient

This article proposes a high-frequency, area-efficient high-side bootstrap circuit with threshold-based digital control (TBDC) that is directly charged by BUS voltage (DCBV). In the circuit, the voltage of the bootstrap is directly obtained from the BUS voltage instead of the on-chip low dropout regulator (LDO), which is more suitable for a high operating frequency. An area-efficient threshold-based digital control structure is used to detect the bootstrap voltage, thereby effectively preventing bootstrap under-voltage or over-voltage that may result in insufficient driving capability, increased loss, or breakdown of the power device. The design and implementation of the circuit are based on CSMC 0.25 µm 60 V BCD technology, with an overall chip area of 1.4 × 1.3 mm2, of which the bootstrap area is 0.149 mm2 and the figure-of-merit (FOM) is 0.074. The experimental results suggest that the bootstrap circuit can normally operate at 5 MHz with a maximum buck converter efficiency of 83.6%. This work plays a vital role in promoting the development of a wide range of new products and new technologies, such as integrated power supplies, new energy vehicles, and data storage centers.

Application of Digital Control Techniques for Satellite Medium Power DC-DC Converters

2011 ◽  
Vol 57 (1) ◽  
pp. 77-83 ◽  
Author(s):  
Konrad Skup ◽  
Paweł Grudziński ◽  
Piotr Orleański
Keyword(s):  
Digital Control ◽  
High Speed ◽  
Control Process ◽  
Digital Signal ◽  
Current Mode ◽  
Power Converter ◽  
Buck Converter ◽  
Research Centre ◽  
Analog To Digital ◽  
Control Techniques

Application of Digital Control Techniques for Satellite Medium Power DC-DC Converters The objective of this paper is to present a work concerning a digital control loop system for satellite medium power DC-DC converters that is done in Space Research Centre. The whole control process of a described power converter is based on a high speed digital signal processing. The paper presents a development of a FPGA digital controller for voltage and current mode stabilization that was implemented using VHDL. The described controllers are based on a classical digital PID controller. The converter used for testing is a 200 kHz, 750W buck converter with 50V/15A output. A high resolution digital PWM approach is presented. Additionally a simple and effective solution of filtering of an analog-to-digital converter output is presented.

Recent Developments in Ride Control

2015 ◽  
Author(s):  
Alan J. Haywood ◽  
Benton H. Schaub ◽  
Chris M. Pappas
Keyword(s):  
Control Systems ◽  
High Speed ◽  
New Technologies ◽  
Early Adoption ◽  
Wide Range ◽  
Ride Control ◽  
Recent Developments ◽  
Material Choice ◽  
Maintenance Requirements ◽  
Broad Understanding

The use of ride control systems on high speed vessels has become the norm within many industries, producing better seakeeping that in turn provides a more comfortable and operationally effective vessel. Commercial ferry designers have been at the forefront of adoption of new technologies notably with early adoption of T-foils and interceptors. These devices have been taken up by others, for example offshore crew boats and frontline naval warships. The range of vessel types has also expanded with more industries adopting different hull designs including catamarans and trimarans. Ride control systems have developed alongside innovative designers producing for example combined lifting foil and ride control systems, lifting T-foil systems, retractable T-foils. This paper will review the different ride control devices including fins, trim tabs, interceptors, T-foils (including retractable T-foils) and lifting foils. As well as technical aspects, the discussion will consider costs, ease of installation, operational and maintenance requirements and material choice. Extensive examples from a wide range of industries will be presented. By the end of the talk, delegates will have a broad understanding of the options available to them in improving the seakeeping of their vessels.

scholarly journals PRECISION FARMING IN FLORICULTURE

2021 ◽  
Vol 9 (1) ◽  
pp. 75-77
Author(s):  
Manas Mandal ◽  
Bappa Paramanik ◽  
Anamay Sarkar ◽  
Debasis Mahata
Keyword(s):  
High Speed ◽  
Geographical Information Systems ◽  
New Technologies ◽  
Precision Farming ◽  
Modern Technology ◽  
Vital Role ◽  
Production Costs ◽  
Aerial Images ◽  
Geographical Information ◽  
Positioning Systems

Precision farming is a science base modern technology which provided management concept based on observation and response to intra-field variations. New technologies such as Global Positioning Systems (GPS), sensors, satellites or aerial images and Geographical Information Systems (GIS) are utilized to assess and analyse variations in agricultural and horticultural production. In this technology have two primary goals that are (i) optimum return (ii) preserving resource.  Wireless Sensor Networks has crucial role to management of water resources, to assess the optimum point of harvesting, to estimate fertilizer requirements and to predict crop performance more accurately, disease and pest hazard also. Sensors use to precision farming technology in horticulture, which increasing productivity, decreasing production costs and minimizing the environmental impact of farming. Though precision farming has vital role in Agriculture and Horticulture sector but, no so popular due to high cost of technology and need high speed internet facility.

scholarly journals Chronopolis Digital Preservation Network

2010 ◽  
Vol 5 (1) ◽  
pp. 119-133 ◽  
Author(s):  
David Minor ◽  
Don Sutton ◽  
Ardys Kozbial ◽  
Brad Westbrook ◽  
Michael Burek ◽  
...  
Keyword(s):  
Data Storage ◽  
High Speed ◽  
San Diego ◽  
Digital Preservation ◽  
Data Grid ◽  
Lessons Learned ◽  
First Year ◽  
Redundant Data ◽  
Wide Range

The Chronopolis Digital Preservation Initiative, one of the Library of Congress’ latest efforts to collect and preserve at-risk digital information, has completed its first year of service as a multi-member partnership to meet the archival needs of a wide range of domains.Chronopolis is a digital preservation data grid framework developed by the San Diego Supercomputer Center (SDSC) at UC San Diego, the UC San Diego Libraries (UCSDL), and their partners at the National Center for Atmospheric Research (NCAR) in Colorado and the University of Maryland's Institute for Advanced Computer Studies (UMIACS).Chronopolis addresses a critical problem by providing a comprehensive model for the cyberinfrastructure of collection management, in which preserved intellectual capital is easily accessible, and research results, education material, and new knowledge can be incorporated smoothly over the long term. Integrating digital library, data grid, and persistent archive technologies, Chronopolis has created trusted environments that span academic institutions and research projects, with the goal of long-term digital preservation.A key goal of the Chronopolis project is to provide cross-domain collection sharing for long-term preservation. Using existing high-speed educational and research networks and mass-scale storage infrastructure investments, the partnership is leveraging the data storage capabilities at SDSC, NCAR, and UMIACS to provide a preservation data grid that emphasizes heterogeneous and highly redundant data storage systems.In this paper we will explore the major themes within Chronopolis, including:a) The philosophy and theory behind a nationally federated data grid for preservation. b) The core tools and technologies used in Chronopolis. c) The metadata schema that is being developed within Chronopolis for all of the data elements. d) Lessons learned from the first year of the project.e) Next steps in digital preservation using Chronopolis: how we plan to strengthen and broaden our network with enhanced services and new customers.

scholarly journals Athlete Monitoring in Rugby Union: Is Heterogeneity in Data Capture Holding Us Back?

Sports ◽  
2019 ◽  
Vol 7 (5) ◽  
pp. 98 ◽  
Author(s):  
Stephen W. West ◽  
Sean Williams ◽  
Simon P. T. Kemp ◽  
Matthew J. Cross ◽  
Keith A. Stokes
Keyword(s):  
High Speed ◽  
Injury Risk ◽  
New Technologies ◽  
Rugby Union ◽  
Central Component ◽  
Significant Heterogeneity ◽  
Athlete Monitoring ◽  
Monitoring Tools ◽  
Wide Range ◽  
Definition Of

In an effort to combat growing demands on players, athlete monitoring has become a central component of professional sport. Despite the introduction of new technologies for athlete monitoring, little is understood about the practices employed in professional rugby clubs. A questionnaire was circulated amongst conditioning staff across the 12 Premiership rugby clubs to capture the methods used, relative importance, perceived effectiveness and barriers to the use of multiple different athlete monitoring measurements. Previous injury, Global Positioning System (GPS) metrics, collision counts and age were deemed the most important risk factors for managing future injury risk. A wide range of GPS metrics are collected across clubs with high-speed running (12/12 clubs), distance in speed zones (12/12 clubs) and total distance (11/12 clubs) the most commonly used. Of the metrics collected, high-speed running was deemed the most important for managing future injury risk (5/12 clubs); however, there was considerable variation between clubs as to the exact definition of high-speed running, with both absolute and relative measures utilised. While the use of such monitoring tools is undertaken to improve athlete welfare by minimising injury risk, this study demonstrates the significant heterogeneity of systems and methods used by clubs for GPS capture. This study therefore questions whether more needs to be done to align practices within the sport to improve athlete welfare.

scholarly journals Design and Analysis of Imaging Chip Using High-Speed AXI-Interface for MPSOC Applications on FPGA Platform

2021 ◽  
Author(s):  
Archana H R ◽  
C R Byra Reddy
Keyword(s):  
Real Time ◽  
Image Enhancement ◽  
High Speed ◽  
Performance Metrics ◽  
Single Chip ◽  
Histogram Method ◽  
Chip Area ◽  
Detection Techniques ◽  
Wide Range ◽  
Contrast Stretching

Abstract The recent innovations in real-time video and image enhancements are allowing much advancement in a wide range of diverse applications. These innovations and advancements provide a new hardware architecture which aims to improve the image visualization, processing speed, and complexity reduction in hardware. The imaging chip concept is introduced in this article to support the Multiprocessing system on chip (MPSoC) applications in real-time scenarios on a single chip. The imaging chip model is designed using high-speed interface protocol, which includes different image enhancement algorithms acts as a master model, Advanced Extensible Interface (AXI)-4 as an interface model, and dual-port memory as a slave model. The image enhancement algorithm includes mainly, Brightness control, contrast stretching, Adaptive median filtering (AMF), Edge-detection techniques, image Thresholding, and Image Histogram method. The AXI-4 provides a high-speed interface for communicating master and slave modules. The proposed model work based on the modes of the operation to process the enhanced image output in MPSoC. The design supports multiple masters and multiple slave modules with reconfigurable nature. The imaging chip is a module on the Xilinx ISE environment and implemented on Artix-7 FPGA, along with the performance metrics like chip Area, time, power, and memory utilization are analyzed with improvements. The model offers low latency and high throughput architecture for real-time Multimedia applications.

scholarly journals Novel Architecture for Binary Multiplication

2019 ◽  
Vol 8 (9S3) ◽  
pp. 641-643
Keyword(s):  
Signal Processing ◽  
High Speed ◽  
Full Adder ◽  
Vital Role ◽  
Basic Unit ◽  
Chip Area ◽  
Speed Reduction ◽  
The Real Estate ◽  
High Speeds ◽  
Technology Advancement

Multipliers is the basic unit for all signal processing applications and other applications. In all technology advancement it plays a vital role, the targets are low power consumption, increase in speed, reduction in area etc. The computations that are done by a modern computers that includes microcomputers and microprocessor is astronomical. Even with the high speed computer chips the process of the data coming from the devices all over the world requires efficient algorithms and to achieve the compatibility we need to use the chip area effectively. The most often encountered computation in data processing or signal processing is the operation of multiplication. This architecture is to present a novice solution to reduce the total area of the multiplier by modifying the partial products addition multiplier. Generally, to compute the data with high speeds modern hardware uses the Wallace tree or dadda multiplication techniques. By reducing the number of partial products addition the number of gates can be reduced used to obtain the final result. In this proposed method we reduced the real-estate of the chip by using more number of full adder in the earlier stages of the partial products addition which is not present in the conventional multipliers.

Microfabrication research at the National Submicron Facility

1983 ◽  
Vol 41 ◽  
pp. 86-89
Author(s):  
E.D. Wolf
Keyword(s):  
Integrated Circuits ◽  
Particle Physics ◽  
High Speed ◽  
New Technology ◽  
High Energy ◽  
High Energy Particle ◽  
New Science ◽  
Wide Range ◽  
Intermediate Domain ◽  
Circuit Function

Most microelectronics devices and circuits operate faster, consume less power, execute more functions and cost less per circuit function when the feature-sizes internal to the devices and circuits are made smaller. This is part of the stimulus for the Very High-Speed Integrated Circuits (VHSIC) program. There is also a need for smaller, more sensitive sensors in a wide range of disciplines that includes electrochemistry, neurophysiology and ultra-high pressure solid state research. There is often fundamental new science (and sometimes new technology) to be revealed (and used) when a basic parameter such as size is extended to new dimensions, as is evident at the two extremes of smallness and largeness, high energy particle physics and cosmology, respectively. However, there is also a very important intermediate domain of size that spans from the diameter of a small cluster of atoms up to near one micrometer which may also have just as profound effects on society as “big” physics.

Site specific agricultural soil management with the use of new technologies

2013 ◽  
Vol 16 (1) ◽  
pp. 59-67
Keyword(s):  
New Technologies ◽  
Digital Interface ◽  
Appropriate Treatment ◽  
Wide Range ◽  
Soil Variation ◽  
Soil Information ◽  
Remote Sensing Techniques ◽  
Agricultural Areas

<p>The Soil Science Institute of Thessaloniki produces new digitized Soil Maps that provide a useful electronic database for the spatial representation of the soil variation within a region, based on in situ soil sampling, laboratory analyses, GIS techniques and plant nutrition mathematical models, coupled with the local land cadastre. The novelty of these studies is that local agronomists have immediate access to a wide range of soil information by clicking on a field parcel shown in this digital interface and, therefore, can suggest an appropriate treatment (e.g. liming, manure incorporation, desalination, application of proper type and quantity of fertilizer) depending on the field conditions and cultivated crops. A specific case study is presented in the current work with regards to the construction of the digitized Soil Map of the regional unit of Kastoria. The potential of this map can easily be realized by the fact that the mapping of the physicochemical properties of the soils in this region provided delineation zones for differential fertilization management. An experiment was also conducted using remote sensing techniques for the enhancement of the fertilization advisory software database, which is a component of the digitized map, and the optimization of nitrogen management in agricultural areas.</p>

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