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研究生: 楊正新
Yang, Chen-Hsin
論文名稱: 一個操作於10Gbs並具有自動阻抗補償功能之串行/解串器
A 10Gbs Serdes Circuit with Auto Impedence Compensation
指導教授: 李順裕
Lee, Shuenn-Yuh
學位類別: 碩士
Master
系所名稱: 電機資訊學院 - 電機工程學系
Department of Electrical Engineering
論文出版年: 2020
畢業學年度: 108
語文別: 中文
論文頁數: 73
中文關鍵詞: 前饋均衡器連續時間的線性均衡器偽隨機亂數序列眼圖
外文關鍵詞: digital intensive, eye diagram, feed-forward equalizer (FFE), continuous time linear equalizer (CTLE), pseudo-random binary sequence (PRBS)
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  • 本論文提出一個可以自動補償功能的電路 ( A 10Gbs Serdes Circuit with Auto Impedence Compensation),主要用於傳輸大量資料的傳輸裝置。並可以適用於不同Loss的PCB板長度並增加訊號的辨識度 和品質 進而 減少 Rx 端的負擔。在 過去論文的架構裡,常常都是 補償在 固定的 Loss 環境 ,但是當 Loss 改變時,常常造成訊號品質的不佳,所以本論文中加了偵測 Loss 變化的 Monitor,可以隨著Loss的改變而更改成不同的補償,以達到訊號品質的最佳化,並讓Rx端的電路減少負擔。
    FFE Feed Forward Equalizer經過了分析後採用了架構為2 tap的 FFE Driver則是 採用SST(Source Series Terminated) 架構使用 2 Tap是因為低功耗以及通道的衰減的考量,所以設定為這個的數量,此外為了讓整個系統更低功耗 且更容易切換不同的補償,用了跟一般傳統D river 不一樣的電路,使用了經過改版後的SST Source Series Terminated Driver ,此為數位控制的Driver,主要利用PMOS和 NMOS中的開和關,來達到不同的DC準位。其傳輸端最高承受的 Loss 為 25dB的通道 (FR4 材質)。而 Monitor 方面使用了BER(Bit Error Rate)的量測方式,驗證所提出Auto Detected的訊號正確率比傳統在 Tx端固定補償的方式來的高。此晶片已透過TSMC 90nm 1P6M CMOS Process 製作,核心面積為 1.1190 mm 2 。
    由量測結果顯示,在供應電壓1V下,其功率消耗為15.8 mW,技術指標(Figure of Merit, FoM)則為1.58 pJ/b。

    This paper presents the design of a 10 Gb/s serial link transmitter with both 2 tap feed forward equalizer (FFE) and capaci tance monitor, and then it improve the performance of the equalization system in the transmitter. This design includes low power FFE that use s source series terminated (SST) driver and low power design with a small amount of tap. In addition to FFE, this transmitter includes an impedance detector to auto detect the channel loss. The FFE can know the different board losses in advance to compensate for the signal at the t ime and improve the signal quality on the board with different losses . The proposed transmitter is fabricated in TSMC 90 nm technology. The transmitter achieves 10 Gb/s maximum data rate under the chip on board assembly. It can withstand the loss of up to 25 dB. The eye width measured is 0.63 UI in 25 dB loss. The measured energy efficiency of the transmitter was 1.58 pJ/b. The transmitter consumes 15.8 mW, wherein the power supply is 1.0 V and the input CLK signal frequency is 5 GHz.

    摘要 I 誌謝 X 章節目錄 XI 表目錄 XII 圖目錄 XIII 第一章 簡介 1 1.1 研究動機 1 1.2 研究背景 3 1.3 章節架構 5 第二章 傳輸端之理論與設計 7 2.1 發射機之規格制訂 14 2.2 電容偵測器的設計與分析 19 2.2.1 電容偵測器理論 19 2.2.2 以數位方式實踐判斷電路的流程和分析 23 2.3 傳輸端周邊電路原理和分析 29 2.3.1 偽隨機二進位陣列產生器 30 2.3.2 Duty Cycle Corrector Circuit理論與分析 32 2.3.3 Source-Series-Terminated Driver理論與分析 35 2.3.4 SST Controller理論與分析 39 2.3.5 多工器的理論與分析 41 第三章 接收端理論與設計 43 3.1 連續時間線性均衡器原理和分析 43 3.2 連續時間線性均衡器作用 47 第四章 量測結果、環境與考量 49 4.1 量測環境的建立 49 4.1.1 量測環境 49 4.2 實驗結果 52 4.2.1 FFE的量測 56 4.2.2 Capacity Monitor的量測 62 4.2.3 CTLE的量測 65 4.3 相關文獻規格比較 69 第五章 結論與展望 70 參考文獻 71

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