·詳細說明：韓國移動電視的測試源樣本， 是H264和AAC打包的- South Korea moves the television the test source sample, is H264 and AAC packs
上傳時間： 2013-05-28
上傳用戶：thuyenvinh
JTAG(Joint Test Action Group;聯合測試行動小組)是一種國際標準測試協議（IEEE 1149.1兼容），主要用于芯片內部測試。
上傳時間： 2013-04-24
上傳用戶：amwfhv
JPEG解碼的C源碼，編譯可執行，只需修改需要解碼的圖像為test.jpg放在同一目錄下就可以執行解碼
上傳時間： 2013-06-08
上傳用戶：1043041441
讀取STM32芯片內部唯一的標識，用于加密等區別其他芯片的操作，有完整注釋，測試通過-STM32 chip to read a unique identifier for the encryption and other differences other chip operation, with complete notes, test
上傳時間： 2013-05-24
上傳用戶：793212294
在軟件Proteus中仿真ucos（ARM）\r\n1.移植除了OS_CPU.h,OS_CPU_A.s,OS_CPU_C.C 三個函數外，對中斷專門用了一個函數OS_int_A.s 按其中的規則寫中斷函數即可. \r\n2。應用實例為\\ArmUCOS\\App\\test1\\test.mcp,在周立功2104的板子上的ram中就可直接運行(code＋data
上傳時間： 2013-09-30
上傳用戶：s363994250
微弱信號檢測裝置 四川理工學院 劉鵬飛、梁天德、曾學明 摘要： 本設計以TI的Launch Pad為核心板，采用鎖相放大技術設計并制作了一套微弱信號檢測裝置，用以檢測在強噪聲背景下已知頻率微弱正弦波信號的幅度值，并在液晶屏上數字顯示出所測信號相應的幅度值。實驗結果顯示其抗干擾能力強，測量精度高。 關鍵詞：強噪聲；微弱信號；鎖相放大；Launch Pad Abstract: This design is based on the Launch Pad of TI core board, using a lock-in amplifier technique designed and produced a weak signal detection device, to measure the known frequency sine wave signal amplitude values of the weak in the high noise background, and shows the measured signal amplitude of the corresponding value in the liquid crystal screen. Test results showed that it has high accuracy and strong anti-jamming capability. Keywords: weak signal detection; lock-in-amplifier; Launch Pad 1、引言 隨著現代科學技術的發展，在科研與生產過程中人們越來越需要從復雜高強度的噪聲中檢測出有用的微弱信號，因此對微弱信號的檢測成為當前科研的熱點。微弱信號并不意味著信號幅度小，而是指被噪聲淹沒的信號，“微弱”也僅是相對于噪聲而言的。只有在有效抑制噪聲的條件下有選擇的放大微弱信號的幅度，才能提取出有用信號。微弱信號檢測技術的應用相當廣泛，在生物醫學、光學、電學、材料科學等相關領域顯得愈發重要。 2、方案論證 針對微弱信號的檢測的方法有很多，比如濾波法、取樣積分器、鎖相放大器等。下面就針對這幾種方法做一簡要說明。 方案一：濾波法。 在大部分的檢測儀器中都要用到濾波方法對模擬信號進行一定的處理，例如隔離直流分量，改善信號波形，防止離散化時的波形混疊，克服噪聲的不利影響，提高信噪比等。常用的噪聲濾波器有：帶通、帶阻、高通、低通等。但是濾波方法檢測信號不能用于信號頻譜與噪聲頻譜重疊的情況，有其局限性。雖然可以對濾波器的通頻帶進行調節，但其噪聲抑制能力有限，同時其準確性與穩定性將大打折扣。
上傳時間： 2013-11-04
上傳用戶：lty6899826
Maxim Analog Essentials are a series of plug-in peripheral modules that allow engineers to quickly test, evaluate, and integrate Maxim components into their hardware/software designs. The modules electrically and physically conform to the Digilent Pmod™ interface specification and are compatible with any Digilent Pmod-compatible header.
標簽： 模擬技術
上傳時間： 2013-11-14
上傳用戶：ljj722
Precision 16-bit analog outputs with softwareconfigurableoutput ranges are often needed in industrialprocess control equipment, analytical and scientificinstruments and automatic test equipment. In the past,designing a universal output module was a daunting taskand the cost and PCB real estate associated with thisfunction were problematic, if not prohibitive.
上傳時間： 2014-12-23
上傳用戶：如果你也聽說
Digital-to-analog converters (DACs) are prevalent inindustrial control and automated test applications.General-purpose automated test equipment often requiresmany channels of precisely controlled voltagesthat span several voltage ranges. The LTC2704 is ahighly integrated 16-bit, 4-channel DAC for high-endapplications. It has a wide range of features designed toincrease performance and simplify design.
上傳時間： 2013-11-22
上傳用戶：元宵漢堡包
A complete design for a data acquisition card for the IBM PC is detailed in this application note. Additionally, C language code is provided to allow sampling of data at speed of more than 20kHz. The speed limitation is strictly based on the execution speed of the "C" data acquisition loop. A "Turbo" XT can acquire data at speeds greater than 20kHz. Machines with 80286 and 80386 processors can go faster than 20kHz. The computer that was used as a test bed in this application was an XT running at 4.77MHz and therefore all system timing and acquisition time measurements are based on a 4.77MHz clock speed.
上傳時間： 2013-10-29
上傳用戶：BOBOniu
