王暉臺灣大學：電信工程學研究所林宗良Lin, Tsung-LiangTsung-LiangLin2007-11-272018-07-052007-11-272018-07-052004http://ntur.lib.ntu.edu.tw//handle/246246/58693此論文的主題是在介紹光纖通訊以及無線通訊系統，並設計其前端放大器。 首先介紹一些之前發表過的文獻和設計動機，還有轉阻放大器及可變增益低雜訊放大器的基本結構。接下來則是此二通訊系統的發射端及接收端各個電路元件的介紹，還有一些基本概念，也討論其運作原理，還有設計時應該考慮的一些參數。雜訊指數的概念在這裡也有被提到。最後是低雜訊放大器的設計步驟。最後一個部分主要是敘述前端放大器之設計，包括轉阻放大器及可變增益低雜訊放大器。在轉阻放大器的設計部份，用到了兩種增加頻寬的方法。此轉阻放大器的增益為53 dBΩ，頻寬為9 GHz。模擬結果和量測結果非常相近。在可變增益低雜訊放大器的設計部份，為了減少晶片面積，在輸入端的匹配電路在晶片外實現。在高增益狀態，量測得到的增益為6 dB，而雜訊指數約為5 dB。在低增益狀態，量測所得到的增益為 –12 dB，雜訊指數為13 dB。The main topics of this thesis are introducing optical and wireless communication systems and designing the front-end amplifiers of the receivers. First, the design motivation, the results of paper survey, and brief description of the structures of TIA and VGLNA are introduced. Then introductions of circuit blocks of the transceivers in each communication system and some basic concepts are given. Operation principles, performance parameters and trade offs are discussed. The basic concept of noise figure is also presented. Finally, the design procedures of LNA are given. In the design of the TIA, two bandwidth-enhancing techniques are used. The TIA achieves a gain of 53 dBΩ with a bandwidth of 9 GHz. In the design of the VGLNA, input matching network is implemented off chip to reduce chip area. The measured gain is 6 dB and noise figure is 5 dB in high gain mode. In low gain mode, the measured results shows a gain of –12 dB and a noise figure of 13 dB.CHAPTER 1. INTRODUCTION 1 1.1 Motivation 1 1.2 Published Results Survey 2 1.3 The Design of Front-end Amplifiers 4 1.4 Thesis Outline 4 CHAPTER 2. COMMUNICATION SYSTEMS 6 2.1 Optical Communication System 6 2.1.1 Transmitter 7 2.1.2 Receiver 8 2.1.3 TIA Design 11 2.2 RF Communication System 13 2.2.1 Power Amplifier, Mixer, and Oscillator 14 2.2.2 LNA Design 15 CHAPTER 3. A 9-GHZ TRANSIMPEDANCE AMPLIFIER USING 0.18-μm CMOS TECHNOLOGY 21 3.1 Basic Structure 21 3.2 Bandwidth-Enhancing Techniques 26 3.2.1 Inductive Peaking 26 3.2.2 Inter-stage Matching 30 3.3 Simulation and Measurement Results 35 3.3.1 Calculating Input-referred Noise Current 35 3.3.2 Measurement Results 37 CHAPTER 4. A 2.4~2.5 GHz VARIABLE GAIN LNA USING 0.35-μm SiGe TECHNOLOGY 44 4.1 Basic Structure 44 4.2 Design Flow 47 4.3 Simulation and Measurement Results 52 4.3.1 On-wafer Probing Measurement 53 4.3.2 Measurement Results With Off-chip Matching Network 57 CHAPTER 5. CONCLUSIONS 63 REFERENCES 65en-US前端放大器Front-end Amplifierthesis