模拟集成电路设计第一章-综述.ppt

Introduction of this course Lecturer: Dr. Wu Zhaohui, School of Electronic and Information Engineering , SCUT , phzhwu@scut.edu.cn, Course Name: Analysis and Design of Analog Integrated Circuits Introduction of this course Text book(英文版教材）: 1、Behzad Razavi, 模拟CMOS集成电路设计（影印版），清华大学出版社， 2005。 中文翻译教材: 1、模拟CMOS集成电路设计 作者：毕查德·拉扎维，译：陈贵灿、程军、 张瑞智 出版社：西安交通大学出版社 ，2003。 Main reference book（参考书）: 1、CMOS模拟集成电路设计（第二版） 作者：phillip E. Allen, Douglas R. Holberg 译：冯军、李智群 出版社：电子工业出版社，2005。 Introduction to Analog DesignWhy analog? (1) 1. Processing of Natural Signals Natural signals are analog, while many signals we used are digital So we need ADC to convert an analog signal to digital signal and then use DSP to process the digital signal. Fig. 1.1a Digitization of a natural signals Introduction to Analog DesignWhy analog? (2) 1. Processing of Natural Signals Well some times, the natural signals are very small, or there exist many interferers (干扰）. In this case, the small signal cannot be converted directly into digital correctly. Therefore, an amplifier (放大器）and a filter (滤波器）are needed before converting. Fig. 1.1b Addition of amplification and filtering for higher sensitivity (灵敏度） Introduction to Analog DesignWhy analog? (3) 2. Digital communications A digital signal through a long cable will be attentuated and distorted. Multi-level signal processing maybe needed to reduce the required transmission bandwidth (传输带宽） Need a DAC in the transmitter to produce multiple levels from the grouped binary data and an ADC in the receiver to determine which level has been transmitted. Fig. 1.2 Attentuation（衰减） and Distortion （失真） of data through a lossy cable Introduction to Analog DesignWhy analog? (4) Fig. 1.3 Multi-level signaling to reduce the bandwidth Introduction to Analog DesignWhy analog? (5) 3. Disk Drive Electronics The signal received from the magnetic head is really weak and the noise is quite high. Just like Fig. 1.1b, there needs amplification, filterin