可測(cè)試性設(shè)計(jì)（Design-For-Testability，DFT）已經(jīng)成為芯片設(shè)計(jì)中不可或缺的重要組成部分。它通過(guò)在芯片的邏輯設(shè)計(jì)中加入測(cè)試邏輯提高芯片的可測(cè)試性。在高性能通用 CPU 的設(shè)計(jì)中，可測(cè)試性設(shè)計(jì)技術(shù)得到了廣泛的應(yīng)用。本文結(jié)合幾款流行的 CPU，綜述了可應(yīng)用于通用 CPU 等高性能芯片設(shè)計(jì)中的各種可測(cè)試性方法，包括掃描設(shè)計(jì)（Scan Design），內(nèi)建自測(cè)試（Built-In Self-Test，BIST），測(cè)試點(diǎn)插入（Test Point Insertion），與 IEEE 1149.1標(biāo)準(zhǔn)兼容的邊界掃描設(shè)計(jì)（Boundary Scan Design，BSD）等技術(shù)。
標(biāo)簽： 可測(cè)試性設(shè)計(jì) CPU
上傳時(shí)間： 2021-10-15
上傳用戶：
The PW2202 is silicon N-channel Enhanced VDMOSFETs, is obtained by the self-aligned planarTechnology which reduce the conduction loss, improve switching performance and enhance theavalanche energy. The transistor can be used in various power switching circuit for system
標(biāo)簽： pw2202
上傳時(shí)間： 2022-02-11
上傳用戶：默默
高清電子書(shū)-C++ Primer Plus, 第6版英文版 1438頁(yè)Learning C++ is an adventure of discovery, particularly because the language accommodates several programming paradigms, including object-oriented programming, generic programming, and the traditional procedural programming.The fifth edition of this book described the language as set forth in the ISO C++ standards, informally known as C++99 and C++03, or, sometimes as C++99/03. (The 2003 version was largely a technical correction to the 1999 standard and didn’t add any new features.) Since then, C++ continues to evolve.As this book is written, the international C++ Standards Committee has just approved a new version of the standard.This standard had the informal name of C++0x while in development, and now it will be known as C++11. Most contemporary compilers support C++99/03 quite well, and most of the examples in this book comply with that standard. But many features of the new standard already have appeared in some implementations, and this edition of C++ Primer Plus explores these new features. C++ Primer Plus discusses the basic C language and presents C++ features, making this book self-contained. It presents C++ fundamentals and illustrates them with short, to-the-point programs that are easy to copy and experiment with.You learn about input/output (I/O), how to make programs perform repetitive tasks and make choices, the many ways to handle data, and how to use functions.You learn about the many features C++ has added to C, including the followi
標(biāo)簽： C++
上傳時(shí)間： 2022-02-19
上傳用戶：trh505
本系統(tǒng)采用電動(dòng)機(jī)電樞供電回路串接采樣電阻的方式來(lái)實(shí)現(xiàn)對(duì)小型直流有刷電動(dòng)機(jī)的轉(zhuǎn)速測(cè)量。該系統(tǒng)主要由二階低通濾波電路,小信號(hào)放大電路、單片機(jī)測(cè)量顯示電路、開(kāi)關(guān)穩(wěn)壓電源電路等組成。同時(shí)自制電機(jī)測(cè)速裝置,用高頻磁環(huán)作為載體,用線圈繞制磁環(huán),利用電磁感應(yīng)原理檢測(cè)電機(jī)運(yùn)行時(shí)的漏磁,將變化的磁場(chǎng)信號(hào)轉(zhuǎn)化為磁環(huán)上的感應(yīng)電流。用信號(hào)處理單元電路將微弱電信號(hào)轉(zhuǎn)化為脈沖信號(hào),送由單片機(jī)檢測(cè),從而達(dá)到準(zhǔn)確測(cè)量電機(jī)的速度的要求。In this system, the sampling resistance of armature power supply circuit is connected in series to measure the speed of small DC brush motor. The system is mainly composed of second-order low-pass filter circuit, small signal amplifier circuit, single-chip measurement and display circuit, switching regulated power supply circuit and so on. At the same time, the self-made motor speed measuring device uses high frequency magnetic ring as the carrier, coil winding magnetic ring, and electromagnetic induction principle to detect the leakage of magnetic field during the operation of the motor, which converts the changed magnetic field signal into the induced current on the magnetic ring. The weak electric signal is transformed into pulse signal by signal processing unit circuit, which is sent to single chip computer for detection, so as to meet the requirement of accurate measurement of motor speed.
標(biāo)簽： 直流電動(dòng)機(jī)
上傳時(shí)間： 2022-03-26
上傳用戶：
German universities and scientists have repeatedly set the intermational standard in drive technology. Identification and active compensation of natural frequencies in oscillatory mechanics, status controls with monitoring structures incorporating acceleration sensors, adaptive compensation of measurement system deficiencies, self-adjusting detent torque compensation… everything invented with only a single aim in mind: to continue improv-ing the motion control, dynamics, precision and processing speed of your machines. For the industrial applicabability of this technology scientific publications in proceedings and laboratory test rigs are not enough. These features consequenty need to be converted into cost-efficient and easily manageable products. That 's exactly what we have done.So in future, if you should need more than today ' smarket can offer you, now everything isgoing to be alright. With our new high-performance ServoOne drive series you will experi-ence
標(biāo)簽： servoone
上傳時(shí)間： 2022-06-24
上傳用戶：kingwide
陀螺儀硬件自檢：相關(guān)方法陀螺儀允許用戶測(cè)試機(jī)械和電氣部分。自檢的代碼在 InvenSense提供的 MotionApps?軟件里面。如果沒(méi)有使用 MotionApps?軟件，請(qǐng)參閱下節(jié)(Obtaining the Gyroscope Factory Trim (FT) Value)。當(dāng)自檢啟動(dòng)，片上的電子設(shè)備就會(huì)啟動(dòng)相應(yīng)的傳感器。這次啟動(dòng)會(huì)使傳感器的 proofmasses的距離相當(dāng)于一個(gè)預(yù)定的科里奧利力（Coriolis force）。傳感器的 Proof masses位移變換的結(jié)果將在輸出信號(hào)中反映。輸出信號(hào)用戶可以在自檢反饋看到。自檢反饋（STR）定于如下：Self Test Response=Gyroscope Output with Self Test Enabled — Gyroscope Output with Self Test Disabled自檢反饋通過(guò)反饋與出產(chǎn)的評(píng)估比較查找變換用于確定這部分通過(guò)還是自檢失敗
上傳時(shí)間： 2022-07-23
上傳用戶：xsr1983
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