臺灣博碩士論文加值系統

放大器的應用範圍很廣。在音頻的領域之中，Ｄ類音頻功率放大器是目前使用最頻繁也最熱門的放大器。Ｄ類放大器在訊號的處理上，最主要是對聲音源作脈衝寬度調變，最後的輸出級則銜接放大電流所需的ＭＯＳ場效電晶體，藉以提升電流推動喇叭。本論文嘗試把Ｄ類放大器與ＭＯＳ功率場效器電晶體同時一起整合在晶片之中，以縮小電路的面積，達到降低成本的目的。同時，內建功率電晶體的部分則採用TSMC 0.35�慆的製程搭配新式八角型佈局，以提高單位面積所能承載的消耗功率。
本論文之主要研發目的在於整合聲頻放大器所有需要的元件，全部製作成單一顆積體電路，從聲音源信號輸入到擴音喇叭輸出之間只需使用本論文之單一ＩＣ便可，無須再使用任何其它的離散元件，而預定的兩瓦額定輸出功率應足以應付耳機、隨身聽或是手機……等等日常生活所需之可類攜式電子產品，冀望可以提升相關電子產業之經濟附加價值與競爭能力。

A Class D audio amplifier is basically a switching amplifier or a PWM amplifier. The output transistors are operated as switches. When the PMOS power transistor is turned on, the sourcing current from supply voltage will be fed to the output. On the contrary, the sinking current to the ground will be drawn from the output while the NMOS power transistor is turned on.
In a class D amplifier, the switches are either fully on or fully off to significantly reduce the power losses in the output stage. The efficiency is very high. The audio signal is used to generate a PWM carrier which drives the output stage. A succeeding low pass filter is adopted to remove the high frequency component of the PWM carrier.
Instead of general stacked or waffle layout of power MOSFETs, the octagonal layout is adopted to offer enough output sourcing/sinking currents as well as to provide strong ESD reliability with an economic chip area. The power handling capability of the amplifier is designed to 2W which is large enough for most portable consumer electronics, such as wireless earphones, walkmans and mobile phones. All necessary components are integrated in the proposed circuit to greatly reduce the overall cost and to enhance the competitiveness of the corresponding electronic industries.

第一章 緒論
第一節 研究動機 ……………………………………………… 1
第二節 論文架構 ……………………………………………… 4
第二章 功率放大器
第一節 功率放大器 …………………………………………… 5
第二節 Ａ類功率放大器簡介 ………………………………… 10
第三節 Ｂ類功率放大器簡介 ………………………………… 13
第四節 ＡＢ類功率放大器簡介 ……………………………… 16
第五節 Ｃ類功率放大器簡介 ………………………………… 18
第六節 脈波寬度調變基本原理 ……………………………… 19
第七節 失真種類 ……………………………………………… 22
第三章 Ｄ類功率放大器原理及設計
第一節 Ｄ類放大器之介紹 …………………………………… 24
第二節 Ｄ類放大器基本原理 ………………………………… 27
第三節 Ｄ類放大器的失真 …………………………………… 31
第四章 Ｄ類放大器電路架構及模擬
第一節 比較器電路 …………………………………………… 32
第二節 非重疊電路 …………………………………………… 43
第三節 緩衝器 ………………………………………………… 45
第四節 Ｎ型功率電晶體 ……………………………………… 46
第五節 Ｄ類放大器電路模擬 ………………………………… 48
第五章 晶片佈局與總結
第一節 晶片佈局 ……………………………………………… 52
第二節 總結 …………………………………………………… 56

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