劉深淵臺灣大學：電子工程學研究所陳威盛Chen, Wei-ShengWei-ShengChen2007-11-272018-07-102007-11-272018-07-102004http://ntur.lib.ntu.edu.tw//handle/246246/57628本論文主題在於使用標準互補式金氧半製程，實現一個低功率消耗的寬頻放大器。此放大器架構亦被用來建構兩個不同用途的寬頻放大器。論文內容可分三大主題，分別為無線通訊/光通訊前端的原理介紹、一個可達到寬頻操作的放大器架構、及以此架構完成適用於UWB系統的帶通放大器和適用於光通訊前端接收的自動增益調整放大器。 接收器前端的基本原理部分，分別介紹了光通訊及UWB無線通訊的概念，及此兩種系統所須要的參數。 之後，會先介紹一個新架構的7.5GHz寬頻放大器及其用來提升頻寬的原理。接下來利用此放大器實現一個UWB的前端放大器。這個UWB放大器有20dB的電壓增益及可調增益範圍，並且經過量測，-10dB頻寬可以從1.8GHz到8.8GHz，只消耗了40mW的電力。 最後的主題為，自動可變增益放大器(AGC)的架構及運作原理。依照現有的理論，及使用之前提出的寬頻放大器結構，建構了一個AGC迴路。並且介紹了相關的數學模型及設計實例。最後，用CMOS製程實現了一個6.5GB/S頻寬的AGC迴路，並附上其量測結果。The goal of this work is to use a standard CMOS process to construct a wideband amplifier with low power consumption. And two applications of this wideband amplifier are presented. This thesis covers three major topics. First, the fundamental theories of wireless/optical communication systems are introduced. Then a wideband amplifier structure is proposed. Finally, a UWB amplifier and a AGC amplifier built by the proposed wideband amplifier are discussed. Some important fundamental theories of wireless/optical receiver front-end are reviewed. Some essential circuit parameters are also introduced. Then, we would show the design of a 7.5 GHz wideband amplifier and its bandwidth improving technique. Then this amplifier is used to construct a UWB front-end wideband amplifier of 20dB gain tuning range, 1.8 – 8.8 GHz measured bandwidth, and 40mW power consumption. At last, the principles and architectures of the automatic gain control are discussed. With discussing the typical structures and existing solutions of AGC circuits, an AGC is composed. Complete mathematical analysis both in time and frequency domains will be introduced. And a 6.5 Gb/s AGC loop has been implemented and experimental results are presented.Chapter 1 Introduction 1 1.1 Motivation 1 1.2 Design Challenges 2 1.3 Thesis Overview 3 Chapter 2 Background and Fundamental Theories 5 2.1 Background 5 2.1.1 Ultra Wideband System 5 2.1.2 Optical Communication 6 2.2 Front-end Amplitude Control Architectures 8 2.2.1 Limiting Amplifier 8 2.2.2 Automatic Gain Control (AGC) Amplifier 12 2.3 Optical Receiver Parameters 15 2.3.1 Sensitivity and Bit Error Rate (BER) 15 2.3.2 Eye Diagram 17 2.4 Wireless Receiver Parameters 18 2.4.1 Linearity 18 2.4.2 Noise Figure 20 Chapter 3 A Wideband Amplifier and Its Application in UWB Front-End 23 3.1 Motivation 23 3.2 Circuit Architecture and Simulation Result 24 3.3 Measurement of Wideband Amplifier 30 3.4 UWB Amplifier 32 Chapter 4 A 5Gb/s Automatic Gain Control Amplifier 39 4.1 Motivation 39 4.2 AGC Architecture 39 4.2.1 Mathematical Model 40 4.3 System Design and Simulation Result 43 4.3.1 Loop Parameters 43 4.3.2 Building Blocks 45 4.3.3 Simulation Result 48 4.4 Layout and Performance Summary 49 4.5 Measurement Result 49 Chapter 5 Conclusion 65 Bibliography 679402996 bytesapplication/pdfen-US放大器自動增益調整寬頻widebandamplifierAGCthesishttp://ntur.lib.ntu.edu.tw/bitstream/246246/57628/1/ntu-93-R91943089-1.pdf