共查询到20条相似文献,搜索用时 15 毫秒
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提出了用一种简单模型计算随频率变化的电感。由于稠密的部分电感矩阵使得方程求解非常困难,采用二次求逆的方法对其进行处理。采用频变电感的计算方法,分析了三种类型电源网络的电感随频率变化的特性。由计算结果可知,网络的回路电感随信号频率的升高呈下降趋势,且成对分布的电源网络的回路电感最小。这为电源网络的设计和同步开关噪声的分析提供了一定的依据。 相似文献
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《Very Large Scale Integration (VLSI) Systems, IEEE Transactions on》2008,16(9):1240-1243
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讨论了集成电路向高集成度、高工作频率和高传输速率继续发展时,常规金属互连出现的困难以及集成电路芯片上光互连具有的潜在优势.介绍了组成芯片上光互连的光发射器件、光接收器件和光传输器件等三种基本器件及其与硅集成电路集成的研究新进展.最后展望了集成电路芯片上光互连的应用前景. 相似文献
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集成电路芯片上光互连研究的新进展 总被引:1,自引:0,他引:1
讨论了集成电路向高集成度、高工作频率和高传输速率继续发展时 ,常规金属互连出现的困难以及集成电路芯片上光互连具有的潜在优势 .介绍了组成芯片上光互连的光发射器件、光接收器件和光传输器件等三种基本器件及其与硅集成电路集成的研究新进展 .最后展望了集成电路芯片上光互连的应用前景 . 相似文献
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《Very Large Scale Integration (VLSI) Systems, IEEE Transactions on》2005,13(7):869-872
We formulate the following voltage setup problem: how many levels and at which values should voltages be implemented on the system to achieve the maximum energy saving by dynamic voltage scaling (DVS)? This problem challenges whether DVS technique's full potential in energy saving can be reached on multiple voltage systems. In this paper, 1) we derive analytical solutions for dual-voltage system; 2) we develop efficient numerical methods for the general case where analytical solutions do not exist; 3) we demonstrate how to apply our proposed algorithms in system design; and 4) our experimental results suggest that, interestingly, multiple voltage systems with proper voltage setup can be very close to DVS technique's full potential in energy saving. 相似文献
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Oprins H. Van der Veken G. Nicole C.C.S. Lasance C.J.M. Baelmans M. 《Components and Packaging Technologies, IEEE Transactions on》2007,30(2):209-217
In this paper, the capability of a novel cooling system for microchannels based on the principle of electrowetting is examined. To start with, the elcctrowetting effect in microchannels is experimentally investigated. The used electrowetting system consists of a liquid droplet deposited on a conductive Si substrate and electrically insulated from this substrate by a dielectric, layer. Microchannels of 100 mum times 100 mum are etched in the substrate. By applying an ac voltage signal between the droplet and the substrate, the microchannels can be periodically tilled and emptied with the liquid of the droplet. This oscillating liquid flow will be used to cool the chip. For the 100 mum times 100 mum microchannels a voltage of 51 V is required for the actuation. Further, based upon the results of the filling of the channels the cooling capacity of the proposed system is theoretically investigated. The theoretically achievable cooling rate of this enhanced system is compared to the heat transfer by conduction through a silicon substrate. A critical filing period is found; for shorter filling periods, the heat transfer will be improved by inserting microchannels, for higher filling periods the electrowetting deteriorates the cooling. It can be concluded that the proposed system is promising, especially when frequencies in the range of a few Hz can be achieved. 相似文献
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High-Performance On-Chip Transformers With Partial Polysilicon Patterned Ground Shields (PGS) 总被引:2,自引:0,他引:2
Lin Y.-S. Chen C.-Z. Liang H.-B. Chen C.-C. 《Electron Devices, IEEE Transactions on》2007,54(1):157-160
In this brief, we propose the concept of "partial patterned ground shields (PGSs)" to improve the performances of RF passive devices, such as inductors and transformers. Partial PGS can be achieved after the redundant PGS of a traditional complete PGS, which is right below the spiral metal lines of an RF passive device, is removed for the purpose of reducing the large parasitic capacitance. A set of test transformers has been implemented to demonstrate the partial PGS. The results show that when the partial PGS was adopted, a 56.5% (from 6.12 to 9.58) and a 55.7% (from 5.55 to 8.64) increase in Q-factor, an 18.2% (from 0.67 to 0.79) and a 21.4% (from 0.66 to 0.8) increase in maximum available power gain (GAmax), and an 18.4% (from 0.69 to 0.82) and a 21.2% (from 0.69 to 0.83) increase in magnetic-coupling factor (kim) were achieved at 4.2 and 5.2 GHz, respectively, for a bifilar transformer with an overall dimension of 230times215 mum2. Furthermore, compared with the transformer with traditional PGS, a 9.9% (from 10.1 to 11.1 GHz) increase in resonant frequency (fSR), a 38% (from 6.94 to 9.58) increase in Q-factor at 4.2 GHz, and a 5.3% (from 0.75 to 0.79) increase in GAmax at 4.2 GHz were obtained. These results demonstrate that the proposed partial PGS is very promising for high-performance RF-ICs applications 相似文献
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AndreasLindemann 《世界电子元器件》2002,(6):44-46
ISOPLUS 14IM系列功率半导体器件提供的性能使其非常适合开关模式电源(SMPS)应用:集成度高、工作特性可针对高开关频率优化、集成隔离/绝缘措施可以简化安装,此外对于高电压应用如果需要的话还可提供较大的防放电和漏电间隔。本文详细介绍了这些器件所使用的技术,并特别针对开关电源应用讨论了其特性。 相似文献
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Frank M. Kuhl M. Erdler G. Freund I. Manoli Y. Muller C. Reinecke H. 《Solid-State Circuits, IEEE Journal of》2010,45(1):205-213
A stabilized power supply realized by chip-integrated micro fuel cells within an extended CMOS process is presented in this paper. The fuel cell system delivers a maximum power output of 450 ? W/cm2. The electronic control circuitry consists of an LDO, an on-chip oscillator and a programmable timing network. The core system consumes an average power of 620 nW. The system reaches a current efficiency of up to 92% and provides a constant output voltage of 3.3 V. 相似文献
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本文描述了ESD的基本概念,介绍了电力电子集成电路的ESD保护方法和技术。最后,指出了在版图设计中应注意的一些问题。 相似文献
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Horst S. Bairavasubramanian R. Tentzeris M.M. Papapolymerou J. 《Microwave Theory and Techniques》2007,55(11):2439-2446
A modification of the Wilkinson power divider is presented that eases planar implementation while maintaining performance. By adding transmission lines between the resistor and the quarter-wave transformers of the traditional design, a range of valid solutions exists that meet the conditions of being reciprocal, isolated between the output ports, and matched at all ports. The proposed design is particularly useful at millimeter-wave frequencies where reduced physical dimensions make a circuit configuration suitable for low-cost package-level implementation difficult using traditional methods. Two frequency bands are demonstrated. At V-band, the circuit gives 0.3-dB excess insertion loss, 19-dB isolation, and 50% bandwidth. At the W-band, the circuit gives 0.75-dB excess insertion loss, 24-dB isolation, and 39% bandwidth. 相似文献
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从改变CM O S电路中能量转换模式的观点出发,研究CPL电路在采用交流能源后的低功耗特性。在此基础上提出了一种仅由nM O S构成的低功耗绝热电路——nM O S Com p lem en tary Pass-trans istor A d iabaticLog ic(nCPAL)。该电路利用nM O S管自举原理对负载进行全绝热驱动,从而减小了电路整体功耗和芯片面积。nCPAL能耗几乎与工作频率无关,对负载的敏感程度也较低。采用TSM C的0.25μm CM O S工艺,设计了一个8-b it超前进位加法器和功率时钟产生器。版图后仿真表明,在50~200 MH z频率范围内,nCPAL全加器的功耗仅为PAL-2N电路和2N-2N 2P电路的50%和35%。研究表明nCAPL适合于在VLS I设计中对功率要求较高的应用场合。 相似文献
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介绍一种以DSP为核心的便携谐波功率电源,论述了该电源的工作原理、技术要点及软件设计思想。针对电力部门对电网运行质量进行检测的要求,可以实现对有谐波含量的仪器、仪表计量误差校验。 相似文献
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Garimella S.V. Singhal V. Liu D. 《Proceedings of the IEEE. Institute of Electrical and Electronics Engineers》2006,94(8):1534-1548
Liquid-cooled microchannel heat sinks are regarded as being amongst the most effective solutions for handling high levels of heat dissipation in space-constrained electronics. However, obstacles to their successful incorporation into products have included their high pumping requirements and the limits on available space which precludes the use of conventional pumps. Moreover, the transport characteristics of microchannels can be different from macroscale channels because of different scaling of various forces affecting flow and heat transfer. The inherent potential of microchannel heat sinks, coupled with the gaps in understanding of relevant transport phenomena and difficulties in implementation, have guided significant research efforts towards the investigation of flow and heat transfer in microchannels and the development of microscale pumping technologies and novel diagnostics. In this paper, the potential and capabilities of microchannel heat sinks and micropumps are discussed. Their working principle, the state of the art, and unresolved issues are reviewed. Novel approaches for flow field measurement and for integrated micropumping are presented. Future developments necessary for wider incorporation of microchannel heat sinks and integrated micropumps in practical cooling solutions are outlined. 相似文献
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Breeta SenGupta Dimitar Nikolov Urban Ingelsson Erik Larsson 《Journal of Electronic Testing》2017,33(1):7-23
This paper addresses reduction of test cost for core-based non-stacked integrated circuits (ICs) and stacked integrated circuits (SICs) by test planning, under power constraint. Test planning involves co-optimization of cost associated with test time and test hardware. Test architecture is considered compliant with IEEE 1149.1 standard. A cost model is presented for calculating the cost of any test plan for a given non-stacked IC and a SIC. An algorithm is proposed for minimizing the cost. Experiments are performed with several ITC’02 benchmark circuits to compare the efficiency of the proposed power constrained test planning algorithm against near optimal results obtained with Simulated Annealing. Results validate test cost obtained by the proposed algorithm are very close to those obtained with Simulated Annealing, at significantly lower computation time. 相似文献
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《Very Large Scale Integration (VLSI) Systems, IEEE Transactions on》2010,18(1):157-161