呂學士Lu, Shey-Shi臺灣大學:電子工程學研究所蔡秉修Tsai, Ping HsiuPing HsiuTsai2010-07-142018-07-102010-07-142018-07-102009U0001-1708200913431900http://ntur.lib.ntu.edu.tw//handle/246246/189277此篇論文設計了一個適用於軟體定義無線電之可數位程式控制的低通濾波器。為了達成高階的濾波器設計，在此我們串接由單級操作放大器所構成的主動式轉導電阻電容之架構。此架構結合了轉導電容濾波器（吳寄生極點）與主動電阻電容濾波器（高線性度）的優點。此外，在我們所需的操作截止頻率中，它提供了可數位程式控制的頻寬與功率消耗。此論文中我們討論兩個同一架構，不同製成的晶片。一是實現於0.18um CMOS製成，操作於1.8v的電壓。另一晶片則是實現於90nm CMOS製成，操作於1.2v的電壓。.18um CMOS的低通濾波器提供了0.54MHz到15.71MHz 的切換頻率範圍。雜訊的範圍則取決於截止頻率而落在47.9nV/Hz到186nV/Hz之間，功率消耗則是0.69mW 到 21.6mW. 晶片的面積為1.43 * 1.42 mm2.0nm CMOS的低通濾波器則是提供了0.13MHz到30MHz 的切換頻率範圍。雜訊的範圍為87nV/H，功率消耗則是0.83mW 到 25.73mW. 晶片的面積為1.3 * 1.2 mm2.This thesis presents an approach to design a digitally programmable low pass filter intended for a software-defined radio (SDR) front-end. To obtain high-order filtering, we exploit a cascade of single-amplifier biquadratic sections, namely active-Gm-RC and Rauch. These cells combine the advantage of Gm-C filters (no parasitic poles) with the advantages of Active-RC filter (large linear range). Furthermore, they provide digitally programmable bandwidth and power consumption with a fully customizable cut-off frequencies range.he realized chips in this work can be generally divided into two categories to their technology. One is realized in 0.18um CMOS technology with 1.8-V supply voltage and the other is realized in 90nm CMOS technology with 1.2-V supply voltage.he 0.18um LPF provides a frequency tuning range between 0.54MHz and 15.71MHz with noise level between 47.9nV/Hz and 186nV/Hz whereby the power consumption conveniently varies from 0.69mW to 21.6mW. The die area is 1.43 * 1.42 mm2. he 90nm LPF provides a frequency tuning range between 0.13MHz and 30MHz with noise level between 87nV/Hz whereby the power consumption conveniently varies from 0.83mW to 25.73mW. The die area is 1.3 * 1.2 mm2.Chapter 1 Introduction 1.1 Motivation 1.2 IEEE Wireless Standards Overview 2.3 Thesis Overview 4hpater 2 Software-Defined Radio 5.1 Evolvement of the Software-Defined Radio System 5.2 Achievement of the Software-Defined Radio System 7.3 The Structure of the Software-Defined Radio System 9hapter 3 The flexible Operational Amplifier 12.1 Introduction to the Operational Amplifier 12.2 Two-stage Operation Amplifier 13.2 .1 Op-amp Gain 14.2.2 Small Signal Analysis 15.2.3 Noise 17.2.4 Common Mode Feedback 18.3 Flexible Operation Amplifier 20.3.1 AC response of the Flexible Op-amp 22.3.2 Noise 24.4 Simulation Result 25.4.1 The 1.8V Flexible Op-amp 25.4.2 The 1.2V Flexible Op-amp 29hapter 4 The Flexible Low-Pass Filter 32.1 Introduction of filter design 32.1.1Filter Category by Transfer Characteristic 32.1.2 Filter Specifications 33.1.2.1 Magnitude Characteristics 33.1.2.2 Phase Characteristics 34.1.3 Challenges in the Design of Flexible Analog 36.1.3.1 Performance programmability 37.1.3.2 Energy scalability 38.1.3.3 Complexity and reliability 38.1.3.4 Costs 38.2 The active Gm-RC biquad 39.3 The flexible Low-pass filter 46.3.1Flexible Passive Components 46.3.1.1 The Capacitor array 46.3.1.2 The resistor array 48.3.2 The flexible Low-Pass Filter architectures 49.4 Simulation Results 53.3.1 The 1.8V Flexible Low-Pass Filter 53.3.1.1 AC response 53.3.2 The 1.2V Flexible Low-Pass Filter 56.3.2.1 AC response 56.5 Layout 59.5.1 TSMC 0.18μm CMOS Flexible Low-Pass Filter 59.5.2 UMC 90nm CMOS Flexible Low-Pass Filter 60hapter 5 Measurement 61.1 Measurement Setup 61.1.1 Die photograph and PCB design 61.1.2 AC Response Measurement Setup 62.1.3 Linearity Measurement Setup 64.1.4 Noise Measurement Setup 65.2 Measurement Results of the 1.8V flexible LPF 69.2.1 Measured AC Response 69.2.2 Input-Referred Noise Measurement ………………………………...73.2.3 Linearity Measurement………………………………………………74.3 Measurement Results of the 1.2V flexible LPF…………………………….76.3.1 Measured AC Response…………………………………………..…76hapter 6 Conclusion 80eferences 823040317 bytesapplication/pdfen-US軟體定義無線電低通濾波器SDRLPFActive-Gm-RCthesishttp://ntur.lib.ntu.edu.tw/bitstream/246246/189277/1/ntu-98-R96943154-1.pdf