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研究生:林侑正
研究生(外文):Yu-cheng Lin
論文名稱:使用時序切割加法器和多階轉換器之增強型無濾波器D類音頻放大器設計
論文名稱(外文):A Enhanced Design of Filterless Class D Audio Amplifier Using Time-Division-Adder and Multilevel Converter
指導教授:林俊偉林俊偉引用關係
指導教授(外文):Chun-wei Lin
學位類別:碩士
校院名稱:國立雲林科技大學
系所名稱:電子與資訊工程研究所
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2008
畢業學年度:96
語文別:中文
論文頁數:64
中文關鍵詞:D類音頻放大器音頻放大器多階轉換器時序切割加法器
外文關鍵詞:Time Division AddermultilevelAudio amplifierClass D Audio Amplifier
相關次數:
  • 被引用被引用:1
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  • 下載下載:93
  • 收藏至我的研究室書目清單書目收藏:0
本論文提出一增強式之設計方法,設計無濾波器D類音頻放大器,其架構基礎為多階訊號,此多階技術包含一個多階轉換器和一個附隨於調變器之後的時序切割加法器。此法將經過脈寬調變後之訊號重新安排配置成許多時間片段且將這些時間片段裡訊號的資訊整合相加成二進位數字,然後將此二進位碼編碼轉換為控制多階轉換器所需之並列的控制訊號,此多階轉換器將傳送多階訊號至揚聲器,進而取代傳統的二階訊號。總諧波失真(THD)和訊號雜訊比(SNR)在沒有犧牲功率效率的情況下,有顯著明顯的改善,且本文所提出之方法可以適用於任何一種設計D類音頻放大器的方法,只要在調變器後插入時序切割加法器,並搭配多階轉換器取代傳統的輸出級。
In this work, we propose a design enhancement method for filterless class D audio amplifier based on multi-level architecture. The multi-level technique is consisted of a multi-level-converter (MLC) and a time-division-adder (TDA) followed by modulator. In this method, the modulated signal is arranged to several time divisions and integrated into a binary numeric. Then, the binary numeric is encoded to be a set of parallel control signal for MLC. The MLC will deliver multi-level signal to loudspeaker instead of conventional two-level signal. Consequently, the total-harmonic-distortion (THD) and signal-noise-ratio (SNR) will be significantly improved without sacrificing power efficiency. Moreover, the proposed method can be used in any class D audio amplifier design by simply inserting a TDA behind modulator and replacing output stage with MLC.
中文摘要 ……………………………………………………………………………… i
英文摘要 ……………………………………………………………………………… ii
致謝 ……………………………………………………………………………… iii
目錄 ……………………………………………………………………………… iv
圖目錄 ……………………………………………………………………………… v
表目錄 ……………………………………………………………………………… vii
第一章 緒論........................................................ 1
1-1 研究背景.................................................... 1
1-2 研究動機.................................................... 4
1-3 相關研究.................................................... 6
1-4 論文架構.................................................... 8
第二章 音頻放大器.................................................. 9
2.1 A類音頻放大器............................................... 9
2.2 B類音頻放大器............................................... 11
2.3 AB類音頻放大器…………………………………………………………… 13
第三章 增強型D類音頻放大器設計..................................... 16
3.1 基本脈波寬度調變D類音頻放大器............................... 16
3.2 創新時序切割加法器(TDA)之理論分析與證明................... 19
3.3 使用時序切割加法器和多階轉換器之無濾波器D類音頻放大器....... 25
3.4 雙H橋多階轉換器............................................. 27
第四章 硬體電路實現................................................ 30
4.1 各個區塊之電路實現 .......................................... 30
4.2 實驗結果與比較.............................................. 42
4.3 實測結果.................................................... 45
第五章 結論........................................................ 52
參考文獻 ……………………………………………………………………………… 53
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