English  |  正體中文  |  简体中文  |  Items with full text/Total items : 26987/38787
Visitors : 2288330      Online Users : 46
RC Version 4.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Adv. Search
LoginUploadHelpAboutAdminister

Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/18412

Title: 5.2GHz CMOS非整數型頻率合成器之設計
5.2GHz CMOS Fractional-N Frequency Synthesizer
Authors: Wu-Chuan Cheng
鄭吳全
Contributors: NTOU:Department of Electrical Engineering
國立臺灣海洋大學:電機工程學系
Keywords: 頻率合成器
Frequency Synthesizer
Date: 2004
Issue Date: 2011-07-04
Abstract: 本論文提出一個工作在5GHz頻帶上的分數頻率合成器。整數型頻率合成器無法兼顧頻率解析度與鎖頻時間,而分數頻率合成器無上述問題,但會有分數突波產生,其分數突波可由雜訊整形技術消除。本分數頻率合成器包含相位頻率偵測器、電荷泵浦、迴路濾波器、電壓控制振盪器、除頻器、和差調變器。除頻器係使用注入鎖定除頻器當前置除頻器以減少功率消耗,可程式除頻器當多模除頻器。迴路濾波器為二階被動低通濾波器。和差調變器為MASH 1-1-1架構。電壓控制振盪器為LC振盪器,其在1MHz頻率偏移處的相位雜訊為-116dBc/Hz,可調頻率範圍為4.91GHz至5.38GHz。我們使用台灣積體電路製造公司0.18微米CMOS製程設計鎖相迴路,本分數頻率合成器解析度為27KHz,鎖定時間為8微秒。
A 5GHz CMOS fractional-N frequency synthesizer is designed in this thesis. Usually, it is very difficult to reach high frequency resolution and short locking time at the same time for traditional integer-N frequency synthesizer. While fractional-N frequency synthesis allows a PLL to have finer frequency resolution than reference frequency. But it suffers from fractional supers. These fractional spurs can be reduced and suppressed with a delta-sigma modulator technology. This synthesizer is composed of a phase/frequency detector, a charge pump, a loop filter, a voltage controlled oscillator, frequency dividers and a delta-sigma modulator. The frequency dividers are composed of an injection-locked frequency divider and a programmable divider. The loop filter is a second-order passive filter. The delta-sigma modulator is MASH 1-1-1 architecture. The VCO exhibits a phase noise of -116dBc/Hz at 1MHz offset frequency and an output frequency ranges from 4.91GHz to 5.38GHz. TSMC 0.18um CMOS process is used for this frequency synthesizer design and simulation. The frequency resolution of this fractional-N frequency synthesizer is 27KHz and the locking time is 8 us.
URI: http://ethesys.lib.ntou.edu.tw/cdrfb3/record/#G0M92530015
http://ntour.ntou.edu.tw/ir/handle/987654321/18412
Appears in Collections:[電機工程學系] 博碩士論文

Files in This Item:

File Description SizeFormat
index.html0KbHTML646View/Open


All items in NTOUR are protected by copyright, with all rights reserved.

 


著作權政策宣告: 本網站之內容為國立臺灣海洋大學所收錄之機構典藏,無償提供學術研究與公眾教育等公益性使用,請合理使用本網站之內容,以尊重著作權人之權益。
網站維護: 海大圖資處 圖書系統組
DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback