臺灣博碩士論文加值系統

本論文使用TSMC 0.18 COMS 1P6M的製程，設計一個應用於IEEEE 802.11 a/b/g的雙頻帶四相位壓控振盪器(QVCO) 。本架構利用開關來切換以電感改變VCO的中心頻率，以及採用互補式架構，且不使用尾電流源來產生四相位訊號。此一雙頻帶四相位壓控振盪器操作在2.4及5.2 GHz時，於供應電壓為1.8 V情況下，消耗功率為31.8 mW。可調頻率範圍為2.265~2.584 GHz及4.761~5.771 GHz。偏移頻率在1MHz時，可得相位雜訊為-119.7 dBc/Hz及-113.7 dBc/Hz。

In this thesis,We design a dual-band LC quadrature VCO for IEEE 802.11 a/b/g application using TSMC 0.18 CMOS 1P6M process.The proposed QVCO is based on switched inductance and complementary structure is used to generate guadrature output signals.The dual-band QVCO is operated at 1.8V,power consumption is 31.8mW, tuning ranges are 2.265 GHz to 2.584 GHz at 2.4 GHz and 4.761 GHz to 5.771 GHz at 5.2 GHz.With 1 MHz offset,the phase noise are -119.7 dBc/Hz at 2.4 GHz and -113.7 dBc/Hz at 5.2GHz.

中文摘要…………………………………………………………………………i
英文摘要…………………………………………………………………………ii
誌謝………………………………………………………………………………iii
目錄………………………………………………………………………………iv
表目錄……………………………………………………………………………vi
圖目錄……………………………………………………………………………vii
第一章 緒論……………………………………………………………………1
1.1研究動機及目的…………………………………………………1
1.2 IEEE 802.11規範……………………………………………2
1.3 收發機系統架構...……………………………………………4
1.3.1 收發機基本原理……………………………………………4
1.3.2 接收機種類架構……………………………………………6
1.3.3 鏡像干擾……………………………………………………9
1.3.4 發射機種類架構……………………………………………10
1.3.5 收發機的性能指標…………………………………………11
1.4論文流程與架構………………………………………………………15
第二章 振盪器原理與設計考量…………………………………………………16
2.1 振盪器原理………………………………………………………16
2.1.1 回授式………………………………………………………16
2.1.2 反射式………………………………………………………18
2.2 CMOS壓控振盪器架構……………………………………………19
2.2.1 環型振盪器……………………………………………………19
2.2.2 LC諧振(LC Tank)振盪器……………………………………20
2.3 品質因素(Quality factor)………………………………24
2.4 振盪器的性能參數及設計考量………………………………27
第三章 相位雜訊……………………………………………………………………32
3.1 相位雜訊的定義………………………………………………32
3.2 相位雜訊對通訊系統的影響…………………………………34
3.3 壓控振盪器的相位雜訊………………………………………34
3.3.1 非時變模型(time invariant model)……………………34
3.3.2 時變模型(time variant model)…………………………38
第四章 2.4/5.2G雙頻帶四相位壓控振盪器設計…………………………………43
4.1 正交輸出的方法………………………………………………43
4.1.1 除頻器…………………………………………………………43
4.1.2 RC-CR或多相位濾波器………………………………………44
4.1.3 雙交叉耦合LC振盪器…………………………………………48
4.2 設計方法………………………………………………………49
4.3 電路架構………………………………………………………52
4.4 模擬結果………………………………………………………54
4.5 結果與討論……………………………………………………65
第五章 結論…………………………………………………………………………67
參考文獻…………………………………………………………………………………68

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