上應改由一穩定的電壓源供應其共模電壓,其可以改善之前的電路佈局時輸 入資料上其 50Ω的匹配電阻接在供應電壓和輸入電晶體的闡級端之間,由 於供應電壓的不穩定所造成輸入資料的不穩定問題,而在另一個 D 型正反 器的 clock 輸入端的 50Ω的匹配電阻上,若 50Ω的匹配電阻上改由一穩定 的電壓源供應其共模電壓,則可以改善之前電路佈局時 50Ω的匹配電阻接 在地端和輸入電晶體的闡級端之間所造成一大電流成份,和地的抖動所造 成之輸入資料抖動的問題。
---在前置放大器的電流源控制線路上,前置放大器中的各個電流源的偏壓供 給方式,應以電流鏡的方式給予,並應把此一電流源偏壓供應電路的供給 電壓源以另一穩定的電源供應器供給,使得前置放大器可以具有更穩定的 電流源。
---在電路佈局中的電晶體基底電壓的供給方式應把其和電路中流經大電流源 的供給電壓源和地分開,而另以一穩定的電壓源供給之。
---在迴授控制電路上之所以無法有穩定的功率控制結果,其原因在於外給的 二個參考電壓準位相差只有 20mV 因而在如此大的供應電壓不穩定和地的 不穩定情況下會有比較電路的輸出結果不穩定的情況,因此改變比較器的 電阻值,把參考電壓準位改成 200mV 實為必要。
參考文獻
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簡歷
學生陳建文,性別:男,出生於民國 69 年 10 月 15 日,台灣省嘉義縣,自 1996/9~1999/7 畢業於嘉義高中,在完成高中課程後於 1999/9~2003/7 畢業於成 功大學,再於 2003/9~2006/1 完成研究所課程,畢業於交通大學電子工程學系,
論文題目為
一個 2.5Gb/s 可控制雷射發光亮暗功率比之脈衝式雷射二極體驅動電路
A 2.5Gb/s CMOS Burst Mode Laser Driver With Extinction Ratio Control 指導老師: 陳巍仁老師。