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脉冲量子级联激光器(QCL)因自热效应会导致谱线展宽,故需极短的电流脉冲驱动。理论极限线宽所需的脉宽为5~15 ns,但由于环路寄生参数的影响,窄脉冲会引起信号过冲或振荡,因此目前商用的QCL驱动器无法满足这个要求。为获得更理想的激光器线宽,在常规脉冲恒流电路的基础上,采用频率补偿的方法来消除过冲和振荡,并设计了一款稳定的纳秒级激光器驱动电路。实验结果显示该驱动装置实现了峰值电流0~2 A、脉宽8...
针对增益均衡器小型化的发展趋势和要求,设计了多子结构单元级联的Ku波段的半模基片集成增益均衡器.谐振子单元与主传输线在三层介质基板上,成空间立体分布,构成七层结构;提出了利用多节微带线枝节进行阻抗匹配的过渡带设计方法,根据坐标变换分析得到HMSIW谐振腔的主模;采用羟基铁填充的吸收柱阵列调节衰减量和Q值,给出了该结构均衡器的设计步骤.与微带均衡器相比,该均衡器提高了Q值,减小了损耗.测试结果表明,...
Fabrication and analysis of Copper Indium Gallium di-Selenide (CIGS) nanoparticles-based thin film solar cells are presented and discussed. This work explores non-traditional fabrication processes, su...
Lithium-ion batteries are widely used for portable electronics due to high energy density, mature processing technology and reduced cost. However, their applications are somewhat limited by safety con...
A novel method of power management and sequential monitoring of several sensors is proposed in this work. Application specific integrated circuits (ASICs) consisting of analog and digital sub-systems ...
A new method for capturing 3D video from a single imager and lens is introduced in this research. The benefit of this method is that it does not have the calibration and alignment issues associated wi...
In this work we have designed and simulated a thermal bi-directional integrated circuit mass flow sensor. The approach used here was an extension to the gas flow model given by Mayer and Lechner. The ...
In this thesis, we focus on two broad categories of problems, exciton condensation and bound states, and two complimentary approaches, real and momentum space, to solve these problems. In chapter 2 we...
As the technology sizes of semiconductor devices continue to decrease, the effect of nanometer technologies on congestion, signal integrity, crosstalk etc. are becoming more significant. These all fac...
Part 1: In this the main objective of the project was to produce a VHDL design which can be programmed on Altera DE2 board. This project gives an overview of how different components of DE2 board can ...
The fundamental operating characteristics of the utility interactive, or grid connected, inverter is explored. The foundation of photovoltaic and power electronics is established, along with the conce...
In this project, a physics based analytical model is proposed for Gallium Nitride (GaN) based metal semiconductor field effect transistor (MESFET) by using MATLAB software. The analytical model has be...
This paper is concentrated on the development of a complete complementary silicon MESFET technology. The basic difference between MOS and MES are pointed out and design criteria for CMES inverters usi...
A novel microstrip patch antenna topology is presented for achieving a dual-band response with arbitrarily closely spaced resonances. This topology is based on a coupled transmission line structure in...
With more and more ICs being used in sectors requiring confidentiality and integrity like payment systems, military, finance and health, there is a lot of concern in the security and privacy of ICs. T...

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