Eyebrow Corner

高速介面的相位偏移規格 總結幾個目前常用並且明文規定的高速介面的相位偏移規格： 單位間隔（Unit Interval, UI）是數據傳輸中的一個基本單位時間，用來表示信號在傳輸過程中的每個比特或符號的時間長度。它是高速串行接口設計中的關鍵參數，用於計算抖動、偏移（skew）等時間參數。UI 的計算方法如下：  Unit Interval (UI) UI 是每個比特或符號的時間間隔，其計算方法是數據速率的倒數。 公式： UI  =  1 /  數據速率 ​ 數據速率通常以 Giga Transfers per second (GT/s) 或 Giga Baud (GBd) 表示，這些單位代表每秒傳輸的比特或符號的數量。 Skew Spec. of High Speed Interfaces Summarize the skew specifications of several currently commonly used and clearly specified high-speed interfaces: The Unit Interval (UI) is a fundamental unit of time in data transmission, used to represent the duration of each bit or symbol during signal transmission. It is a crucial parameter in the design of high-speed serial interfaces, used for calculating jitter, skew, and other timing parameters. The calculation method for UI is as follows:  (UI) UI is the time interval for each bit or symbol, calculated as the reciprocal of the data rate. Formula: UI  =  1 /  Data Rate ​ The data rate is typi...

 2024年Computex在台灣，今年跟往年最明顯的差異，就是以前都是標榜Intel Inside，現在都是標榜Nvidia Inside，各大Server Vendor都在展示GB200的機櫃，另外就是AI的應用；今年還有特別的科技業護國神物：乖乖，台灣的神秘力量。 Computex was held in Taiwan in 2024. The most obvious difference between this year and previous years is that it used to advertise Intel Inside, but now it advertises Nvidia Inside. All major server vendors are displaying GB200 cabinets and AI applications were shown everywhere. This year there are special technology industry’s protection myth: Guaiguai, AKA Taiwan’s mysterious power.

用ADS存取電感的S2P檔 1. 新建一個工作空間 2. 建立一個電路示意圖 3. 在Parts裡的Basic Components找到TermG以及SP，擺上圖示 4. 再從Data Items內找到S元件，擺上圖示 5. 雙擊SnP圖示，設定port數以及載入SnP檔路徑（這裡代入S2P檔，故設定port number = 2） 6. 點擊上方功能區的走線，將TermG以及SnP圖示連接起來。 7. 雙擊S-PARAMETERS以設定起始頻率、終止頻率及取樣間隔 8. 點擊上方模擬按鍵以進行模擬及偵錯 9. 使用左側Eqn圖示建立下圖的的電感及Q值的方程式 Use ADS to read SnP file 1. Create a new workspace 2. Create a schematic 3. Find TermG and SP in Basic Components from Parts and drag the icon to the blank space 4. Find the S component from Data Items and drag the icon to the proper position 5. Double-click the SnP icon, set the port number and the path to load the SnP file (Here load the S2P file, so set port number = 2) 6. Click on the wiring in the upper functional area to connect the TermG and SnP icons. 7. Double-click S-PARAMETERS to set the start frequency, stop frequency and sampling interval 8. Click the simulation button above to perform simulation and debugging 9. Use the "Eqn" diagram on the left to establish the equations for the ind...