臺灣博碩士論文加值系統

本論文研究方向為主動式混頻器在不同頻段的設計與實現，所設計的混頻器實現於0.16 um CMOS製程以及 0.1 um GaAs pHEMT製程。
在0.16 um CMOS製程所設計為10-15 GHz主動式雙平衡混頻器，採用傳統吉伯特混頻器架構，在轉導級加入transformer轉導提升，在開關級加入transformer降低LO輸入功率，使用current-reuse bleeding注入電流提升轉換增益，最後使用active Load搭配TIA buffer來改善整體線性度，混頻器最大轉換增益為17.5 dB，直流電壓1.8 V，消耗功率45.9 mW，整體面積0.77 mm2。
0.1 um GaAs pHEMT製程則是設計為67-80 GHz主動式雙平衡混頻器，採用傳統吉伯特混頻器架構，在RF與LO輸入加入被動式balun，輸入平衡訊號，加入差動放大器以及source follow於IF輸出端來提升轉換增益與達到良好匹配，混頻器最大轉換增益為16.31 dB，直流電壓8 V，消耗功率456.7 mW，整體面積2.25 mm2。

In this thesis, two active mixcer were design and implementation in different bands, using a 0.16 um CMOS process and a 0.1 um GaAs pHEMT process, respectively.
A 10 to 15 GHz active double-balanced mixer in 0.16 um CMOS process was used, the Gilbert-cell mixer with transformer to achieve transconductance-boosted in transconductance stage and to reduce LO input power in switching stage, The current-reused current bleeding technique also adopted to rise up the conversion gain. The active load with TIA buffer was employed to improve linearity. The maximum conversion gain of proposed mixer was 17.5 dB at 12 GHz PLO=2 dBm. The mixer occupies a chip area, including probing pads, of 0.77 mm2 and consumes 25.5 mA, with a supply voltage of 1.8 V.
A 67 to 80 GHz active double-balanced millimeter-wave Gilbert-cell mixer in 0.1 um GaAs pHEMT process was studied. Two Marchand baluns are used in RF- and LO-ports to convert single-ended signals to differential signals, for wideband use. The differential amplifier and source follower are added in IF ports to rise up conversion gain and improve matching. The maximum mixer conversion gain is 16.31 dB at 77 GHz at PLO=3 dBm and 2.25 mm2 size with 456.7 mW power consumption.

摘要 i
ABSTRACT 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 1
1.2 研究論文大綱 2
第二章 文獻回顧 3
2.1 主動式負載(Active load) 3
2.2 電流重複利用注入(Current-reuse bleeding) 6
2.3 轉導提升(Gm-Boosted) 8
2.4 轉阻式負載(Transimpedance load) 10
2.5 結論 11
第三章 使用變壓器轉導提升吉伯特混頻器 12
3.1 電路架構與原理 12
3.2 電路模擬結果 16
3.3 結果與討論 22
第四章 67～80 GHz吉伯特混頻器 23
4.1 電路架構與原理 23
4.2 電路模擬與量測結果 27
4.3 結果與討論 36
第五章 結論 37
參考文獻 38

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