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Low overdrive voltage and low current compact comparator for a diamond dosimeter ASIC

Low overdrive voltage and low current compact comparator for...

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ieee symposium on Nuclear Science (NSS/MIC)

作者： F. Petulla F. de Notaristefani V. Orsolini Cencelli E. D'Abramo A. Fabbri D. Riondino M. Marinelli G. Verona-Rinati Department of Electronic Engineering INFN Sez. Roma III University of Rome Roma Tre Rome Italy INFN Sez. Roma III University of Rome Roma Tre Rome Italy Department of Mechanical Engineering INFN Sez. Roma II University of Roma Tor Vergata Rome Italy

The dosimeters for radiotherapy must comply to strict requirements in terms of sensitivity, toxicity, tissue equivalence and radiation hardness. At present time both silicon and diamond dosimeters are used as solid state devices and in recent years, monocrystalline diamond sensors have been grown with CVD techniques. Due to the low current signals, the sensor readout is made by electrometers connected to the device with multi wire shielded cables. This measurement setup may be a serious limitation for practical application of these sensors, and makes impossible the use of matrix sensors. We present some functional block design for an ASIC that could replace the electrometer and the cabling for the measurements. The system will be realized by an hybrid assembly with the detector, or the detector matrix, very closely placed and wire bonded to the readout ASIC. The device is designed in 180 nm UMC technology with dual power supply, 3.3 V for the analog front end, in order to extend the signal dynamic, and 1.8 V for the control logic.

关键词： Low voltage Application specific integrated circuits Wire Cable shielding Detectors Silicon Solid state circuits Assembly systems Bonding Signal design

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Application of radial line slot antenna to millimeter-wave systems at 60 GHz band

Application of radial line slot antenna to millimeter-wave s...

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Antennas and Propagation Society International symposium

作者： T. Yamamoto M. Ando N. Goto M. Takahashi Department of Electrical and Electronic Engineering Faculty of Engineering Tokyo Institute of Technology Tokyo Japan Department of Electronics and Communication Engineering Faculiy of Engineering Musashi Institute of Technology Tokyo Japan

In recent years, various types of system in millimeter-wave band have been developed. In a millimeter-wave system, it is suitable to make use of an antenna without feed loss. A radial line slot antenna (RLSA) is a slotted waveguide planar antenna proposed for direct broadcast from satellite (DBS) subscribers in the 12 GHz band. Since this antenna utilizes a waveguide as a feed circuit, a high efficiency is theoretically expected irrespective of the frequency. This paper presents the design of RLSA at 60 GHz band and predicts its performance.

关键词： Slot antennas Satellite broadcasting Antenna feeds Millimeter wave circuits Satellite antennas Planar waveguides Planar arrays Antenna theory Waveguide theory Frequency

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Machine Learning based Surrogate Modeling for Wave Impedances in Rectangular Dielectric Waveguides

Machine Learning based Surrogate Modeling for Wave Impedance...

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Microwave, MTT-S International symposium

作者： Robin Schmitz Birk Hattenhorst Christoph Baer Thomas Musch Ilona Rolfes Institute of Microwave Systems Ruhr University Bochum Germany Institute of Electronic Circuits Ruhr University Bochum Germany

Even though the behavior of rectangular dielectric waveguides (RDWGs) can be evaluated accurately using numerical simulations, limited time and computational resources generally do not allow an extensive exploration of the design space. Thus, in this paper we present a way to develop a fast-to-evaluate surrogate model for the wave impedance of the fundamental mode HE 11 in RDWGs at frequencies between 134 and 141 GHz. To this end, gaussian process regression (GPR) with a customized covariance function as well as artificial neural networks (ANNs) and polynomial regression (PR) are applied. Compared by the mean absolute deviation (MAD), our finally proposed model shows much better agreement with numerical solutions than Maractili’s famous approximate analytical approach (MA). In contrast to MA, our approach is furthermore applicable to DWGs with arbitrary cross-sections.

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Towards next-generation design-for-manufacturability (DFM) frameworks for electronics product realization

Towards next-generation design-for-manufacturability (DFM) f...

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ieee/CHMT(CPMT) International electronics Manufacturing Technology symposium

作者： M. Bajaj R. Peak M. Wilson Injoong Kim T. Thurman M.C. Jothishankar M. Benda P. Ferreira J. Stori Engineering Information Systems Lab GWW School of Mechanical Engineering Georgia Institute of Technology Atlanta CA USA Georgia Tech (GIT) GWW School of Mechanical Engineering Atlanta GA Manufacturing Research Center Georgia Institute of Technology Atlanta GA USA Georgia Tech (GIT) Manufacturing Research Center Atlanta GA Rockwell Collins (ReI) Cedar Rapids Iowa USA Rockwell Collins (ReI) Cedar Rapids Iowa Department of Mechanical and Industrial Engineering University of Illinois at Urbana Champaign (VIUe) Urbana IL USA

This paper elucidates the process architecture of a pilot implementation of a DFM Framework (specifically the SFM DFM Framework or SDF), which consists of four key ingredients. The first ingredient is a design Integrator that acquires product design information from an ECAD tool and in-house sources (each populating a subset of the design) and consolidates them into a STEP AP210 model. The second ingredient is a Rule-based Expert System (initiated at Boeing) that captures the manufacturability constraints as DFM rules and evaluates printed circuit assembly (PCA) designs against them. The third ingredient is a design View Generator that extracts design information from the AP210 model (first ingredient) and library database and derives a Kappa design model for the expert system (second ingredient) to evaluate. The fourth ingredient is the Results Viewer that helps the user browse DFM analysis results and identify design improvement opportunities. This implementation of the SDF demonstrates the ability to extract PCA design information and build a higher fidelity standards-based design model. Additionally, it also shows the capability of Rule-based Expert systems to emulate manufacturability checks on product (PCAs in this case) designs as well as increase analysis coverage and reduce human checking time via automation.

关键词： design for manufacture Expert systems Principal component analysis Data mining Manufacturing automation Product design electronic design automation and methodology Printed circuits Assembly systems Libraries

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design of Efficient Electrically Small Dual Band Monopole Antenna using Negative Permittivity Metamaterial Structures

Design of Efficient Electrically Small Dual Band Monopole An...

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2008 ieee Antennas and Propagation Society International symposium (APSURSI 2008), vol.5

作者： Jung-Han Kim Ho-Yong Kim Hong-Min Lee Department of Electronic Engineering Kyonggi University South Korea

ISBN: (纸本)9781424420414

As the wireless communication systems which are based on the integrated circuits technology are very quickly developed, electrically small, efficient and having significant bandwidth antennas are required. So, antenna miniaturization has been studied using various methods in the field of radio communication systems. In general, the electrically small antenna is defined as ka < 1. Where, k is wave number and a is the maximum length of antenna. The efficiency, gain, impedance bandwidth and quality factor (Q) of a small antenna are determined according to the maximum length of antenna. The narrow impedance bandwidth, high Q and low gain can be generated by the miniaturization of antenna. Besides, the impedance matching is very difficult due to high reactance of a small antenna. Therefore, the improvements of defects of a small antenna are mainly consideration subjects of the electrically small antenna study [1]. Recently, efficient electrically-small antenna (EESA) using spherical shell of a single negative (SNG) material was proposed by the team of Richard W. Ziolkowski. The efficiency, gain and fractional band width (FBW) of EESA are improved by SNG materials. The SNG materials can be realized by metamaterial (MTM) structures because the SNG materials are none existence in the nature. Therefore, such material structure is necessary for the design of a MTM structure based antenna [2-4]. In this paper, a dual band EESA using negative permittivity MTM structures is proposed. The designed EESA has low Q{sub}(FBW) more than theoretical Q{sub}(Chu) of Chu limits. The equivalent circuit of proposed EESA is realized by Ansoft designer. And the proposed EESA is optimized by 3-D field simulation tool, CST Micro Wave Studio (MWS) [5].

关键词： ANTENNA antennae maximum length Wireless communication systems Monopole antennas synthetic natural gas Quality factor impedance matching Electricity miniaturization Dual band Bandwidth MT1DP gene equivalent circuits STRUCTURES(BY MATERIAL)

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A technology-independent table-based model for advanced GaN Schottky barrier diodes

A technology-independent table-based model for advanced GaN ...

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ieee International Workshop on Radio-Frequency Integration Technology (RFIT)

作者： Zheng Zhong Yong-Xin Guo Science and Technology on Monolithic Integrated Circuits and Modules Laboratory Nanjing Electronic Devices Institute China National University of Singapore Singapore

In this paper, a novel non-quasi-static table-based model has been developed for advanced Gallium Nitride (GaN) Schottky barrier diodes, which are widely used in current RF energy harvesting and wireless power transmission (WPT) applications. This novel table-based model can be simply built based on the measured S-parameters and I-V characteristics of these GaN diodes. In contrast with many complicated traditional models, this technology-independent modeling method includes no ambiguous curve fitting and de-embedding processes. Furthermore, this large-signal model is theoretically suitable for all kinds of diodes and could be easily imported into the computer-aided design (CAD) software. To verify its accuracy, measured and modeled results of different kinds of GaN diodes are compared and excellent agreement has been obtained.

关键词： Decision support systems Radio frequency

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System Analysis of Capacitance-to-Digital Converters Based on a Switched-Capacitor Feedback

System Analysis of Capacitance-to-Digital Converters Based o...

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Midwest symposium on circuits and systems (MWSCAS)

作者： Michele Noviello Ruben Garvi Andres Quintero Susana Paton Electronic Technology Dept. Carlos III University Madrid Spain Radio Frequency and Sensors Infineon Technologies AG Villach Austria

ISBN: (数字)9798350387179

ISBN: (纸本)9798350387186

This work describes the transient and steady-state responses of a voltage-controlled oscillator (VCO)-based analog front-end for capacitive sensors aimed at measuring the distance between the plates. A full VCO-based capacitance-to-digital converter can be obtained by processing the VCO output with a frequency-to-digital converter. The front-end primarily consists of a ring oscillator, whose input is regulated in a closed loop by means of a switched-capacitor (SC)-based feedback. The SC network is also used to couple an unbiased capacitive sensor to the readout without the need for biasing circuitry. This manuscript investigates the ripple generation due to the switching nature of the analyzed architecture, the average behaviour under small-signal variations, and the main noise contributions. The extracted model is validated through transient simulations and can be valuable for design purposes and stability studies.

关键词： Computational modeling Voltage-controlled oscillators Noise Switches Capacitance Stability analysis Capacitive sensors

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Using the boundary scan delay chain for cross-chip delay measurement and characterization of delay modeling flow

Using the boundary scan delay chain for cross-chip delay mea...

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ieee International symposium on Quality electronic design

作者： J. Schmid T. Schuring C. Smalla Lucent Technologies Network Systems Nuremberg Germany

ISBN: (纸本)0769510256

For ASICs/SOCs/lCs it is often very important to have an easily accessible delay measurements path for several reasons. The delay of a long path running across the whole chip through lots of instances (inverters, MUXes) makes it possible to measure the final process parameters of an ASIC/IC within the best and worst case production process window. This information is very important for production testing and assembly at the vendor site. But very often this information is also necessary at circuit pack level, system test level and even in the field - when in the case of problems (functionality, timing, debugging) it should be known which "quality level" the ASIC/IC device has reached. Also for characterization of the delay modeling during the different design phases (estimation, floorplanning, trial and final layout) such a dedicated delay path may help in qualifying the delay models. We propose to use a new standard methodology to address these issues by definition of a dedicated delay path. It is called "Boundary Scan Delay Chain" (BSDC). We use the Boundary Scan data register according to ieee1149.1 to get a delay chain across the chip. Only a slight modification of the boundary scan cell (e.g. BC 1, BC 4) is necessary. The resulting new functionality still conforms to ieee1149.1.

关键词： Circuit testing Delay estimation Semiconductor device measurement Application specific integrated circuits Production Inverters Assembly Integrated circuit testing System testing Timing

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A high performance radiation-hard field programmable analog array

A high performance radiation-hard field programmable analog ...

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ieee International symposium on Quality electronic design

作者： Ji Luo J.B. Bernstein J.A. Tuchman Hu Huang Kuan-Jung Chung A.L. Wilson University of Maryland College Park College Park MD USA Mission Research Corporation Albuquerque NM USA

While interest, availability and use of FPAAs have grown, FPAAs still have not achieved the same success as FPGAs in the digital domain. This results from several factors, including the lack of CAD tools, small circuit density, small bandwidth and layout dependent noise figures. These factors are all related to each other, making the design of a high performance FPAA a multi-dimensional problem. A critical reason behind these difficulties is the non-ideal programming technology, which contributes a large portion of parasitics into the sensitive analog system. This paper presents a high performance, radiation hard Laser Field Programmable Analog Array (LFPAA) using LaserLink MakeLink/spl trade/ technology. Because of its extremely low resistance, negligible parasitic capacitance and full compatibility with commercial CMOS process, MakeLink/spl trade/ can fully reduce these FPAA design concerns and offer a breakthrough capability in analog array performance. The proposed LFPAA consists of a 4 x 4 array of Configurable Analog Blocks (CABs) surrounded by abundant interconnect resources. There are 16 PAD groups around the chip, and 8 tracks per X/Y channel. Each CAB has 4 input and 4 output pins with internal circuit operating in fully differential mode. With appropriate programming, the LFPAA can provide an accurate, low-cost and rapid-prototyping analog ASIC solution.

关键词： Field programmable analog arrays circuits CMOS technology Availability Field programmable gate arrays design automation Bandwidth Noise figure Optical arrays Parasitic capacitance

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Current and voltage tracking controls for a DSP-based SMR

Current and voltage tracking controls for a DSP-based SMR

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ieee International symposium on Industrial electronics (ISIE)

作者： J.Y. Chai C.M. Liaw Department of Electrical Engineering National Tsing Hua University Hsinchu Taiwan

This paper presents the robust digital current and voltage tracking controls for a DSP-based switch-mode rectifier (SMR). First the SIMR power circuit and its DSP-based fully digital control scheme are established. Then the robust current waveform tracking control is made to yield the improved current tracking control performance, and hence the improved line drawn power quality. As to the voltage control, a robust two-degree-of-freedom control scheme is developed. And a systematic design procedure is proposed to find its parameters. Both good voltage tracking and regulation responses are obtained by the developed SMR. Hence it can be employed as a front-end converter for many types of power electronic systems, providing adjustable and well-regulated DC source voltage. Effectiveness of the developed SMR is verified experimentally.

关键词： Voltage control Robust control Current control circuits Digital control Pulse width modulation Rectifiers DC-DC power converters Power quality Power electronics

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