无线收发器20MHz带宽可重构低通滤波器研究与设计

发布时间：2018-05-14 23:41

本文选题：多模/多频带接收机 + 可重构带宽　；参考：《华中科技大学》2015年硕士论文

【摘要】：近年来,随着无线通讯在便携式产品与北斗导航中的应用促使无线标准得到了空前的发展。由于人们日益增长的需求,使得对无线通讯产品的要求逐步提高。对于之前的简单实现单信号的处理已经完全不能满足人们的需求。相比之前,现在要求无线通信产品实现单芯片对多信号进行处理、要求更低的功耗、更小的面积,因此设计一款高集成、低功耗、高性能的无线射频收发机芯片已经成为目前研究重点。在无线通讯发展的过程中,CMOS工艺实现的成本效率极大的增强了多模式无线应用的出现。现在多模/多频带接收机主要是基于复用的方案进行设计。它们避免使用多个芯片,并且能够实现可调谐,这使得它们在面积和功率消耗得到有效控制。对于多信号处理的接收机前端,模拟基带滤波的设计是一个关键的任务。模拟滤波器主要是为了在多模接收机中进行信道的选择,对有用信号不进行衰减或者说很小的衰减,对无用信号作很大的衰减,将有用信号从接收的信号中选择出来。本论文主要研究基于TSMC0.18um工艺的可重构带宽滤波器。如何设计一款高线性、高抑制比与宽调谐范围的滤波器逐步成为科研机构的研究重点,因此来说,非常有必要对可重构带宽滤波器进行研究与设计。本论文主要是通过对滤波器的高线性与宽调谐范围展开讨论与设计。通过对滤波器的重要的组成单元跨导的线性度的分析与改进,从而来改变整体滤波器的线性度。并通过改进跨导单元的结构,实现宽的范围的跨导调谐,使整个滤波器在0.65MHz至20MHz范围可调。通过优化整体电路的Q值,使整体电路的二倍频衰减在整个可调范围内达到20dB/dec。对于电路和版图都基于TSMC0.18um工艺完成,整体电路已经投片。
[Abstract]:In recent years, with the application of wireless communication in portable products and Beidou navigation, wireless standards have been developed unprecedentedly. Due to the increasing demand of people, the demand for wireless communication products is raised gradually. For the simple implementation of single signal processing has been completely unable to meet the needs of people. Compared with the past, wireless communication products are required to process multiple signals on a single chip, requiring lower power consumption and smaller area, so a high integration and low power consumption is designed. High-performance RF transceiver chips have become the focus of research. In the development of wireless communication, the cost efficiency of CMOS technology greatly enhances the emergence of multi-mode wireless applications. The design of multimode / multi-band receiver is mainly based on multiplexing. They avoid the use of multiple chips and are tunable, which allows them to be effectively controlled in terms of area and power consumption. The design of analog baseband filter is a key task for the receiver front end of multi-signal processing. The main purpose of the analog filter is to select the channel in the multi-mode receiver. The useful signal is not attenuated or very small attenuation, and the useless signal is greatly attenuated, and the useful signal is selected from the received signal. In this paper, the reconfigurable bandwidth filter based on TSMC0.18um technology is studied. How to design a filter with high linearity, high rejection ratio and wide tuning range has gradually become the focus of research. Therefore, it is necessary to study and design the reconfigurable bandwidth filter. This paper mainly discusses and designs the high linear and wide tuning range of the filter. The linearity of the whole filter is changed by analyzing and improving the linearity of the important component unit of the filter. By improving the structure of the transconductance unit, a wide range of transconductance tuning is realized, which makes the whole filter adjustable from 0.65MHz to 20MHz. By optimizing the Q value of the whole circuit, the double frequency attenuation of the whole circuit can reach 20 dB / R in the whole adjustable range. For the circuit and layout are based on the TSMC0.18um process, the whole circuit has been cast.
【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN859;TN713.4

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