本文關鍵詞： 集成電路 串擾 物理設計 抗輻射　出處：《國防科學技術大學》2013年碩士論文　論文類型：學位論文

【摘要】：隨著特征尺寸的不斷縮小和工作頻率的不斷提高，串擾已經成為集成電路設計中的關鍵問題。串擾對電路的影響主要表現(xiàn)在兩個方面：一是會引起時序的變化，造成建立時間或者保持時間的違反；二是會引起毛刺噪聲，嚴重的時候會造成電路功能的錯誤。 FT-XV是國防科技大學計算機學院研制的一款宇航用多核處理器。因該處理器的應用目標是各類衛(wèi)星，為了能在太空復雜的電磁環(huán)境中穩(wěn)定可靠的工作，F(xiàn)T-XV不僅要具備抗空間粒子的輻射能力，同時也應該有很強的抗串擾噪聲能力。本文以FT-XV抗輻射處理器的研制工程為背景，就物理設計中遇到的串擾問題展開研究，完成的主要工作如下： 1）利用SPICE模擬器，，基于130nm工藝全面研究了串擾與耦合電容、信號跳變時間及方向、信號的驅動及負載能力、并行金屬導線長度之間的關系，獲得了以上因素對串擾影響的變化規(guī)律。這些研究成果對FT-XV處理器物理設計中串擾的預防和修復起到了理論指導作用。 2）總結出一套控制串擾的物理設計流程，包括串擾預防、串擾分析和串擾修復。其中，串擾預防是整個設計的核心。通過在邏輯綜合中設置合理的信號跳變時間、驅動和負載大小等約束；在布局規(guī)劃中控制布線擁塞；在時鐘網絡綜合時控制耦合電容大小等手段，大大降低了串擾的影響。 3）使用sign-off級的串擾分析工具PrimeTimeSI進行了串擾的靜態(tài)時序分析；對于詳細布線后出現(xiàn)的時序違反，通過增強受擾線上單元的驅動能力和插入緩沖器等方法進行串擾的修復。 4）完成了FT-XV的后端物理設計，將串擾帶來的不利影響控制在要求的范圍內，在因加固設計引入很大延遲的情況下仍達到了120MHz的設計目標。
[Abstract]:With the constant reduction of feature size and the continuous improvement of working frequency, crosstalk has become a key problem in integrated circuit design. The influence of crosstalk on the circuit is mainly reflected in two aspects: first, it will cause the change of time sequence. A violation of the establishment or maintenance time; Second, it will cause burr noise, when serious will cause circuit function error. FT-XV is an aerospace multi-core processor developed by the computer School of National University of National Defense Science and Technology. Because the application of the processor is aimed at all kinds of satellites, in order to be able to work stably and reliably in the complex electromagnetic environment in space. FT-XV should not only have the ability to resist radiation of space particles, but also have strong ability to resist crosstalk noise. The background of this paper is the development of FT-XV anti-radiation processor. The crosstalk problem in physical design is studied. The main work accomplished is as follows: 1) based on the SPICE simulator, the crosstalk and coupling capacitors, the jump time and direction of the signal, the driving and load capacity of the signal are studied comprehensively based on the 130nm process. The relationship between the length of parallel metal conductors. The effects of the above factors on crosstalk are obtained, and these results provide theoretical guidance for the prevention and repair of crosstalk in the physical design of FT-XV processors. 2) summarize a set of physical design flow of crosstalk control, including crosstalk prevention, crosstalk analysis and crosstalk repair. Crosstalk prevention is the core of the whole design. Control routing congestion in layout planning; The influence of crosstalk is greatly reduced by controlling the coupling capacitance during clock network synthesis. 3) the static timing analysis of crosstalk is carried out by using sign-off level crosstalk analysis tool PrimeTimeSI. The crosstalk is repaired by enhancing the driving ability of the unit on the disturbed line and inserting buffer. 4) the back-end physical design of FT-XV is completed, and the adverse effects of crosstalk are controlled within the required range. The design goal of 120MHz has been achieved even though the reinforcement design is delayed.
【學位授予單位】：國防科學技術大學
【學位級別】：碩士
【學位授予年份】：2013
【分類號】：TP332

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