Istanbul University - Journal of Electrical and Electronics Engineering最新文献_第2页

Lossy/Lossless Grounded Inductance Simulators Using Current Feedback Operational Amplifier (CFOA) 基于电流反馈运算放大器(CFOA)的有损/无损接地电感模拟器

Istanbul University - Journal of Electrical and Electronics Engineering Pub Date : 2018-02-23 DOI: 10.5152/IUJEEE.2018.1815

M. Başak, F. Kaçar

引用次数: 12

A Highly Linear Wide-Band Tunable Lna for Military Radio Applications 一种用于军事无线电的高线性宽带可调谐Lna

Istanbul University - Journal of Electrical and Electronics Engineering Pub Date : 2018-02-23 DOI: 10.5152/IUJEEE.2018.1804

H. Dogan

{"title":"A Highly Linear Wide-Band Tunable Lna for Military Radio Applications","authors":"H. Dogan","doi":"10.5152/IUJEEE.2018.1804","DOIUrl":"https://doi.org/10.5152/IUJEEE.2018.1804","url":null,"abstract":"A wide-band tunable Low-Noise Amplifier (LNA) was designed to be used in military radios. The LNA works in the frequency range of 30–512 MHz where military walkie-talkies operate. To cover the wide range of operating frequencies, the output of amplifier is divided into four sub-bands with four separate external inductors and integrated capacitor arrays. The first part of the study analyzes the performance parameters such as the gain, tuning, matching, noise figure, and distortion. Layout of the design was completed, and post-layout simulations, including the layout parasitic effects, were run to quantify the performance. The LNA achieves a minimum of 12-dB gain across the entire operating frequency range. The minimum rejections achieved by the LNA at 10% and 20% offset from the center-tuned frequency were 7 dB and 13 dB, respectively. The LNA achieves a worst-case noise figure of 4.6 dB, and the impedance-match parameter (S11) is better than −20 dB under all the conditions. The worst cases P1dB (1-dB Compression Point) and IIP3 (3rd Order Input Intercept Point) were 9.1 dBm and 18 dBm, respectively, across frequency and process–voltage–temperature corners. The design dissipates 20 mA from a 3.3-V power supply and uses a 1.5-V power supply for capacitor array termination.","PeriodicalId":256344,"journal":{"name":"Istanbul University - Journal of Electrical and Electronics Engineering","volume":"6 9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122157714","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Classification of Texture Images Based on the Histogram of Oriented Gradients Using Support Vector Machines 基于方向梯度直方图的支持向量机纹理图像分类

Istanbul University - Journal of Electrical and Electronics Engineering Pub Date : 2018-02-23 DOI: 10.5152/IUJEEE.2018.1814

Hasan Demir

引用次数: 6

Suboptimal Frequency-Selective Transceiver Design for Multicarrier Millimeter Wave MIMO Systems 多载波毫米波MIMO系统的次优选频收发器设计

Istanbul University - Journal of Electrical and Electronics Engineering Pub Date : 2018-02-23 DOI: 10.5152/iujeee.2018.1813

N. Kabaoğlu

引用次数: 1

Review and Performance Comparison of Pansharpening Algorithms for RASAT Images RASAT图像的泛锐化算法综述及性能比较

Istanbul University - Journal of Electrical and Electronics Engineering Pub Date : 2018-02-23 DOI: 10.5152/IUJEEE.2018.1817

S. Kahraman, A. Erturk

引用次数: 9

Current and Voltage Mode Quadrature Oscillator Based on Voltage Differencing Buffered Amplifier 基于压差缓冲放大器的电流电压型正交振荡器

Istanbul University - Journal of Electrical and Electronics Engineering Pub Date : 2018-02-23 DOI: 10.5152/IUJEEE.2018.1802

A. Yesil, F. Kaçar

引用次数: 6

Corona Identification of Impulse Voltage and Current 脉冲电压和电流的电晕识别

Istanbul University - Journal of Electrical and Electronics Engineering Pub Date : 2018-02-23 DOI: 10.5152/iujeee.2018.1812

E. Önal

{"title":"Corona Identification of Impulse Voltage and Current","authors":"E. Önal","doi":"10.5152/iujeee.2018.1812","DOIUrl":"https://doi.org/10.5152/iujeee.2018.1812","url":null,"abstract":"The corona effect in the power system has a dominant role in reducing the efficiency of the high-voltage lines. In this study, the current and voltage impulses, which are important in corona determination, have been examined in frequecy spectrogram base from test result. The frequency spectrogram graphs have been obtained from the current-time and voltage-time variation by Matlab program. With these graphs, frequency values have been found to provide an important clarification of the insulation performance of electrical equipment for reliable and accurate diagnosis. These values have been observed according to different conditions like pressure, polarity, and insulation ambient. This spectrogram analysis can be used to find the characteristic frequencies and eliminate the disturbance effect. The time between corona steps decrease when Sulphur hexafluoride (SF6) gas pressure is increased. The time of second corona is close to leader's discharge time. Corona starts early when SF6 amount is decreased in gas mixtures. The corona currents are large in the low SF6 gas mixtures, this situation is related to the high insulation of the SF6 gas. A feature which is dependent the frequency is not found.","PeriodicalId":256344,"journal":{"name":"Istanbul University - Journal of Electrical and Electronics Engineering","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130981208","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1