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17th IEEE International conference on solid-state and Integrated Circuit Technology, ICSICT 2024

作者： Su, Yanwen Li, Hao Liu, Dongsheng Hu, Ang Li, Kaiyue School of Integrated Circuit Huazhong University of Science and Technology Wuhan430074 China Hubei Optics Valley Laboratory Wuhan430074 China

ISBN: (纸本)9798350361834

The event-based vision sensor (EVS) is a new image sensor that detects the change in light intensity instead of the value of light. The mechanism of EVS has many advantages such as higher dynamic range, higher detection speed, and lower data redundancy. However, traditional EVSs use pre-defined contrast threshold voltage to detect events, which is risky because of the influence of process voltage temperature (PVT) fluctuation and array mismatch. To solve this problem, this paper presents a global threshold voltage finder technology for the EVS readout circuit. The binary search technology is used to acquire the flip voltage of comparators in the EVS pixel array. The simulation results show that the voltage error between the threshold finder result and the average of the pixel array is 3.83 mV. Compared with a single reference pixel finder, the voltage error reduces by 61% to the standard deviation of pixel arrays. © 2024 IEEE.

关键词： Readout systems

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development of Long Term Stable Multiple-Ion-Selective sensors for Agriculture and Aquaculture applications 70

Development of Long Term Stable Multiple-Ion-Selective Senso...

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70th IEEE Electronic Components and Technology conference (ECTC)

作者： Chen, Yu Goh, Shermin S. Damalerio, Ramona Chen, Weiguo Choong, David Lim, Jason Y. C. Moh, Lionel C. H. Seah, Georgina E. K. K. Tan, Angeline Y. X. Inst Microelect IME SiP Medtech Singapore Singapore Inst Mat Res & Engn Soft Mat Singapore Singapore Inst Mat Res & Engn Elect Mat Singapore Singapore Inst Mat Res & Engn Adv Characterisat & Instrumentat Singapore Singapore Inst Mat Res & Engn Polymer Composite Singapore Singapore

ISBN: (纸本)9781728161808

An integrated multiplex all-solid-state, polymer membrane-based ion-selective-electrode was designed and fabricated. The device includes an on-chip Pt pseudo-reference electrode and three independent Au working electrode. Nitrate, potassium, and phosphate selective membranes are coated on three electrodes independently. The sensitivity, selectivity, and stability of the device are evaluated using a laboratory-made measurement circuit board for ion concentrations from 10 mu M to 100 mM.

关键词： Ion-selective-electrode all-solid-state sensor

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Utilizing a chronopotentiometric sensor technique for metallothionein determination in fish tissues and their host parasites

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sensorS AND ACTUATORS B-CHEMICAL 2007年第1期127卷 112-119页

作者： Petrlova, Jitka Krizkova, Sona Zitka, Ondrej Hubalek, Jaromir Prusa, Richard Adam, Vojtech Wang, Joseph Beklova, Miroslava Sures, Bernd Kizek, Rene Mendel Univ Brno Dept Chem & Biochem CZ-61300 Brno Czech Republic Mendel Univ Brno Dept Anim Nutr & Forage Prod CZ-61300 Brno Czech Republic Brno Univ Technol Dept Microelect CZ-60200 Brno Czech Republic Charles Univ Prague Fac Med 2 Dept Clin Biochem & Pathobiochem CZ-15006 Prague 5 Czech Republic Arizona State Univ Dept Chem & Mat Engn Tempe AZ 85287 USA Arizona State Univ Dept Chem Tempe AZ 85287 USA Univ Vet & Pharmaceut Sci Dept Vet Ecol & Environm Protect CZ-61242 Brno Czech Republic Univ Duisburg Essen D-45117 Essen Germany

Metallothionein (MT) are a class of intracellular proteins possessing cysteme-rich and heavy metal-binding properties. They can be utilized as biomarkers for the detection and assessment of heavy metals in environmental pollution. This paper addresses the development of a sensor technique suitable for the determination of MT in the tissue samples of perches and their parasites. The work suggest a heavy metal biosensor based on interaction of heavy metals (lead(H), cadmium(H), copper(II) and silver(l)) with MT using adsorptive transfer stripping (AdTS) technique in combination with chronopotentiometric stripping analysis. The samples were investigated with various heavy metals (lead(H), cadmium(H), copper(H) and silver(l)), prior to sensor applications to understand the interaction between MT and the metals. The results obtained from this experiment clearly show that cadmium(II) had the highest affinity for MT followed by silver(l), copper(H) and lead(H). Based on these results, we attempted to quantify MT content with respect to content of a heavy metal in the samples of interest. The highest re-evaluated concentration of MT (495 ng/g of fresh weight) was determined in samples of Acanthocephalus anguillae. (c) 2007 Elsevier B.V. All rights reserved.

关键词： metallothionem sensor electrochemical detection peak H perch (Perca fluviatilis) parasites Acanthocephalus lucii and Acanthocephalus anguillae heavy metals

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Synthesis of locally-ordered carbon nanotube arrays from patterned catalyst by self-assembly technique

Synthesis of locally-ordered carbon nanotube arrays from pat...

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China International conference on Nanoscience and Technology (ChinaNANO 2005)

作者： Zou, X. P. Abe, H. Shimizu, T. Ando, A. Tokumoto, H. Zhu, S. M. Zhou, H. S. Beijing Informat Technol Inst Res Ctr Sensor Technol Beijing Key Lab Sensor Beijing 100101 Peoples R China Natl Inst Adv Ind Sci & Technol Nanotechnol Res Inst Tsukuba Ibaraki 3058562 Japan Natl Inst Adv Ind Sci & Technol Nanoelect Res Inst Tsukuba Ibaraki 3058568 Japan Hokkaido Univ Nanotechnol Res Ctr Sapporo Hokkaido 0010021 Japan Natl Inst Adv Ind Sci & Technol Energy Elect Res Inst Tsukuba Ibaraki 3058568 Japan

ISBN: (纸本)9783908451303

Site-selective growth of multi-walled carbon nanotubes (MWCNTs) from an iron oxide nanoparticle catalyst patterned by drying-mediated self-assembly technique is present. The ethanol solution of the iron nitrate was employed as catalyst precursor. The catalyst precursor was mounted on silicon wafer by dip-coating. After evaporation of solvent at room temperature, the catalyst pattern formed. The catalyst pattern was employed to synthesize carbon nanotube pattern by chemical vapor deposition of ethanol vapor after oxidation of iron nitrate. The patterned array of MWCNTs was obtained with a dot size of around 5 mu m and the distance of about 25 mu m. The present method offers a simple and cost-effective method to grow carbon nanotubes with self-assembled patterns.

关键词： carbon nanotubes drying-mediated self-assembly Technique

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High power diode pumped solid state lasers

High power diode pumped solid state lasers

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1992 International conference on Lasers and Optoelectronics

作者： Solarz, R. Albrecht, G. Beach, R. Comaskey, B. Lawrence Livermore National Laboratory Advanced Applications Laser Programs P.O. Box 808 LivermoreCA94550 United States

Although operational for over twenty years, diode pumped solid state lasers have, for most of their existence, been limited to individual diodes pumping a tiny volume of active medium in an end pumped configuration. More recent years have witnessed the appearance of diode bars, packing around 100 diodes in a 1 cm bar which have enabled end and side pumped small solid state lasers at the few Watt level of output. This paper describes the subsequent development of how proper cooling and stacking of bars enables the fabrication of multi kW average power diode pump arrays with irradiances of 1 kW/cm peak and 250 W/cm2 average pump power. Since typical conversion efficiencies from the diode light to the pumped laser output light are of order 30% or more, kW average power diode pumped solid state lasers now are possible. © 1992 SPIE. All rights reserved.

关键词： Pumping (laser)

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Integrated readout electronics: Enabling advanced applications of position-sensitive solid-state radiation detectors

Integrated readout electronics: Enabling advanced applicatio...

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2004 Nuclear Science Symposium, Medical Imaging conference, Symposium on Nuclear Power Systems and the 14th International Workshop on Room Temperature Semiconductor X- and Gamma- Ray Detectors

作者： Cajipe, Victoria B. Calderwood, Robert F. Clajus, Martin Hayakawa, Satoshi Turner, Tümay O. Yin, Shi NOVA RandD Inc. Riverside CA 92507 United States

As applications of advanced solid-state radiation detector arrays proliferate across disciplines ranging from x-ray astronomy and medical imaging to security and industrial inspection, the relative scarcity of low-noise, multi-channel integrated circuits (ICs) needed to read out these arrays has become increasingly apparent. In fact, readout ICs are now regarded to be an integral part of position-sensitive semiconductor detectors for x-ray and gamma-ray imaging. Because the requirements of various detector applications tend to be diverse, a custom IC is typically designed for a specific detector array. This often lengthens the time and raises the cost of system development. To help close the readout technology gap and facilitate advances in this field, NOVA has been formulating strategies for instrumenting different detectors of a given application category with the same "generic" IC which embodies common functions as well as selectable features. A brief overview of possible approaches to such generic ICs will be given. Within this context, accomplishments and ongoing efforts at NOVA in developing front-end ICs for various detector architectures and signal-processing scenarios will be described. We will especially consider the case of ICs used in conjunction with position-sensitive CZT detectors, implemented in traditional soldered lead or flip-chip connection geometries, to perform spectroscopic, energy-binning or current-mode type measurements. © 2004 IEEE.

关键词： Electronic equipment

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Analog OE module development TRP status report

Analog OE module development TRP status report

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conference on Photonics and Radio Frequency

作者： Wang, HTM Yen, HW Yap, D Hsu, HP Hughes Research Labs. (United States)

ISBN: (纸本)0819422320

A Defense Advanced Research Project Agency (DARPA) sponsored consortium combines expertise in military and commercial systems (Hughes, Boeing, GTEL), optoelectronic (OE) manufacturing (Ortel, UTP, Atx Telecom), and DoD applications (MIT Lincoln Lab, NCCOSC RDT&E Division) and leverages collective investments through technology transfer among the partners to develop user friendly and affordable analog OE modules. The availability of such modules will accelerate the pace of optoelectronic module insertion into analog systems and realize the vast market potential and national defense payoffs. Low cost transmitter and receiver modules, transmitter and receiver arrays, OEICs, enhanced and linearized electro-optic modulators, diode pumped solid-state lasers and 16x16 photonic switch arrays have been developed and tested.

关键词： Analog electronics Receivers Modulators Photonic integrated circuits Switches Modulation Defense and security Fiber optics Transmitters Microwave radiation

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Characterization of pixel defect development during digital imager lifetime

Characterization of pixel defect development during digital ...

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conference on sensors, Cameras, and Systems for Scientific/Industrial applications IX

作者： Leung, Jenny Dudas, Jozsef Chapman, Glenn H. Koren, Zahava Koren, Israel Simon Fraser Univ Sch Engn Sci 8888 Univ Dr Burnaby BC V5A 1S6 Canada Univ Massachusetts Dept Elect & Comp Engn Amherst MA 01003 USA

ISBN: (纸本)9780819469885

The reliability of solid-state image sensors is limited by the development of defects, particularly hot-pixels, which we have previously shown develop continuously over the sensor lifetime. Our statistical analysis based on the distribution and development date of defects concluded that defects are not caused by single traumatic incident or material failure, but rather by an external process such as radiation. This paper describes an automated process for extracting defect temporal growth data, thereby enabling a very wide sample of cameras to be examined and studied. The algorithm utilizes Bayesian statistics to determine the presence and absence of defects by searching through sets of color photographs. Monte Carlo simulations on a set of images taken at 0.06 to 0.5sec exposures demonstrated that our tracing algorithm is able. to pinpoint the defect development date for all the identified hot pixels within +/- 2 images. Although a previous study has shown that in-field defects are isolated from each other, image processing functions applied by cameras such as the demosaicing algorithm were found to cause a single defective pixel to appear as a cluster in a color image, increasing the challenge of pinpointing the exact location of hot defects.

关键词： defect detection hot pixel imager defects active pixel sensor APS CMOS image sensor demosaicing

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Spike encoding of artificial olfactory sensor signals

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sensorS AND ACTUATORS B-CHEMICAL 2006年第1期119卷 234-238页

作者： Martinelli, Eugenio D'Amico, Arnaldo Di Natale, Corrado Univ Roma Tor Vergata Dept Elect Engn I-00133 Rome Italy CNR Inst Microelect & Microsyst I-00133 Rome Italy

The investigations on artificial olfactory systems in the last 20 years were basically concerned with the development of chemical sensors with selectivity properties similar to that of natural receptor. As a consequence, among the various features of olfaction emerged in the last two decades only the presumed non-selectivity of receptors is currently considered. Therefore, as physiology progresses enlighted the mechanisms of elaboration of signals in the olfactory pathways, artificial nose concept did not evolve much since its first conjecture. In this paper, an attempt to introduce artificial noses more adherent to recent views on olfaction is presented. The typical methodology of translation of conventional analog sensor signals into biologically similar spikes is applied to chemical sensors and a demonstration of the preservation of information sufficient for odour classification is given through a practical example. (c) 2006 Elsevier B.V. All rights reserved.

关键词： electronic nose spike encoding features extraction

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High-power 2-um diode-pumped Tm:YAG laser

High-power 2-um diode-pumped Tm:YAG laser

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solid state Lasers V

作者： Beach, Raymond J. Sutton, Steven B. Honea, E.C. Skidmore, Jay A. Emanuel, Mark A. Lawrence Livermore Natl. Lab. Livermore CA USA

ISBN: (纸本)0819420727

Using a scalable diode end-pumping technology developed at Lawrence Livermore National Laboratory we have demonstrated a compact Tm:YAG laser capable of generating greater than 50 W of cw 2 micrometer laser output power. The design and operational characteristics of this laser, which was built originally for use in assessing laser surgical techniques, are discussed. The 2 micrometer radiation produced by the 3F4 - 3H6 transition of Tm3+ has many practical applications because it is strongly absorbed by water and also because it is an 'eye-safe' wavelength. The strong absorption of 2 micrometer radiation by water makes this transition a very attractive candidate for performing laser surgical procedures as most tissue types are predominately composed of liquid water. The fact that 2 micrometer radiation is considered 'eye-safe' makes this transition attractive for laser range finding and remote sensing applications where other laser wavelengths could pose a safety hazard. At sufficiently high doping densities, Tm3+ exhibits a beneficial two-for-one quantum pump efficiency enabling well developed AlGaAs laser diode arrays to be used as efficient excitation sources. Many applications requiring 2 micrometer laser radiation such as remote sensing, laser radar, anti sensor, sensor spoofing, and OPO pumping have driven the development of diode pumped all solid state TM3+ laser systems because of their potential for efficiency, compactness, and ruggedness. Here we focus on Tm3+:YAG and the scalable diode end-pumping technology developed at LLNL which enables higher average power operation of diode pumped Tm3+ laser systems than has previously been possible. To date we have demonstrated cw operation of this laser to power levels of 51 W. The end-pumping technology used is the same as was previously used to demonstrate a 100 mJ Q-switched Nd:YLF laser.

关键词： solid state lasers

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