互補式金氧半高速多相位壓控震盪器之設計

Abstract

隨著通訊系統的日益發展，高速傳輸系統的需求使得通訊電路面臨設計上和製程上的挑戰，為了與基頻數位類比混合式電路作整合，同時達到低功率消耗以及低成本的要求，採用CMOS為製程的高速電路已成為近年來的研究趨勢。 多相位震盪器是現代通訊系統中不可或缺的一部分，在本論文中，我們將針對多相位震盪器進行介紹並加以實現。內容可以分成為兩大部分，第一部分主要介紹震盪器的一些基本概念。為了因應高速傳輸的需求；第二部分中，我們將提出多種新型高速多相位震盪器的架構． 本論文的章節安排如下：第一章主要描述多相位震盪器在通訊系統中的重要性；第二章將震盪器的基本原理和元件特性進行探討；第三章整理現今多相位訊號的實現方法；第四章我們以台積電CMOS 0.18-μm製程，實現一個9-GHz的正交壓控震盪器，並提出以切換式偏壓來改善相位雜訊；第五章將呈現一個15-GHz/30-GHz的雙頻多相位壓控震盪器，以及多相位的驗證方式；最後，第六章中，我們實現了一個操作在43-GHz的新型多相位壓控震盪器，所產生的多相位訊號符合光纖通訊OC-768系統所需的規格。

The rapid growth of optical communication markets has motivated the development of high data-rate transceivers. In order to be integrated with the baseband mixed-mode circuits and to achieve the requirements of low power and low cost, utilizing the complementary metal-oxide semiconductor (CMOS) technology has become the design trends. Among the circuits of the communication systems, multi-phase voltage-controlled oscillators (VCOs) are essential building blocks. The thesis will focus on the design of high-speed multi-phase VCOs using CMOS technologies. The details of the thesis are organized as followed. In chapter 1, the applications of multi-phase VCOs in communication systems will be illustrated. The fundamentals of the oscillators from theories and circuit elements will be presented in chapter 2. Different kinds of multi-phase generators will be discussed in chapter 3. In chapter 4, a 9-GHz quadrature-phase VCO with a switched-bias technique is realized in TSMC CMOS 0.18-μm technology. In chapter 5, a 15-GHz/30-GHz dual-band multi-phase VCO with a phase error verification module is presented. Finally, a novel 43-GHz multi-phase VCO, which is suitable for the applications in the OC-768 optical communication systems, will be demonstrated in chapter 6.