Research in High-Frequency Analog Electronic Circuits for Communication Systems

电子电信领域在过去十年中经历了爆炸性的增长，无论是在其商业重要性方面，还是在学术和工业实验室致力于其研究的努力方面。 基于无线电的数字通信似乎将发挥比预期大得多的作用，补充线对上的数据通信，光纤介质将越来越多地用于数据通信骨干。 与过去一样，利用超大规模集成电路技术来降低与这种系统有关的电子设备的成本将是至关重要的。 本研究旨在探索新的方法，使用硅集成电路技术，以提高性能，降低功耗，并降低各种通信系统的组件的成本，主要侧重于数据通信和个人通信系统（PCS）使用无线电和自由空间光介质。 特别强调适用于实现低功耗和低工作电压的RF、IF和基带混合信号通信电路的电路技术。 本研究的主要目标是发现，优化，并展示新的电路方法，允许实现这样的系统的功耗和性能的水平，更接近所使用的基本技术比目前的方法所施加的基本限制。 一般感兴趣的领域是射频局域网和个人通信设备的射频收发器，以及光纤系统和有线系统的收发器。 研究的具体主题是功率优化单片压控振荡器的相位噪声性能限制，新型并行结构采样解调器的研究，MOS采样解调器的失真性能限制，无源采样FIR开关电容滤波器在低功耗、高频滤波环和CDMA解扩中的应用，优化光纤通信接收器的灵敏度，BiCMOS技术在高速通信的特殊需求中的应用，以及用于RF设计的有源和无源IC元件的建模。

The field of electronic telecommunications has experienced explosive growth in the past ten years, both in terms of its commercial importance and in terms of the research effort devoted to it in academic and industrial laboratories. It appears likely that radio-based digital communications will play a much larger role than might have been anticipated, complementing data communications on wire pairs with fiber media coming into increased use for data communications backbones. As in the past, the utilization of VLSI technology to reduce the cost of electronics associated with such systems will be critical. This research is directed at exploring new ways to use silicon integrated circuit technology to improve the performance, reduce the power dissipation, and reduce the cost of components for communication systems of various kinds, with primary emphasis on data communications and Personal Communications Systems (PCS) using radio and free-space optical media. Particular emphasis is placed on circuit techniques applicable to implementation of RF, IF and baseband mixed signal communications circuits with low power and low operating voltage. The primary goal of this research is to discover, optimize, and demonstrate new circuit approaches which allow the implementation of such systems with levels of power dissipation and performance which more closely approach the fundamental limits imposed by the basic technology being used than current approaches. The general area of interest if RF transceivers for RF LANs ald personal communications devices, and transceivers for fiber-optic systems and wire-based systems. Specific topics for investigation are limits-to-phase noise performance in power-optimized monolithic voltage-controlled oscillators, investigation of new parallel- architecture sampling demodulators, limits-to-distortion performance in MOS sampling demodulators, the use of passive- sampling FIR switched capacitor filters for low-power, high- frequency filte ring and CDMA despreading, optimization of the sensitivity in fiber optic communication receivers, the application of BiCMOS technology for the particular needs of high-speed communications, and modeling of active and passive IC components for RF design.