FPGA原理設(shè)計(jì)與應(yīng)用，請(qǐng)用dgreader free.exe打開(kāi)
標(biāo)簽： FPGA
上傳時(shí)間： 2013-09-01
上傳用戶(hù)：gps6888
Abstract: Specifications such as noise, effective number of bits (ENOB), effective resolution, and noise-free resolution inlarge part define how accurate an ADC really is. Consequently, understanding the performance metrics related to noise isone of the most difficult aspects of transitioning from a SAR to a delta-sigma ADC. With the current demand for higherresolution, designers must develop a better understanding of ADC noise, ENOB, effective resolution, and signal-to-noiseratio (SNR). This application note helps that understanding.
標(biāo)簽： ENOB 模數(shù)轉(zhuǎn)換器
上傳時(shí)間： 2013-10-16
上傳用戶(hù)：x18010875091
The LT®6552 is a specialized dual-differencing 75MHzoperational amplifier ideal for rejecting common modenoise as a video line receiver. The input pairs are designedto operate with equal but opposite large-signal differencesand provide exceptional high frequency commonmode rejection (CMRR of 65dB at 10MHz), therebyforming an extremely versatile gain block structure thatminimizes component count in most situations. The dualinput pairs are free to take on independent common modelevels, while the two voltage differentials are summedinternally to form a net input signal.
上傳時(shí)間： 2014-12-23
上傳用戶(hù)：13691535575
基于MDK RTX 的COrtex—M3 多任務(wù)應(yīng)用設(shè)計(jì) 武漢理工大學(xué) 方安平 武永誼 摘要：本文描述了如何在Cortex—M3 上使用MDK RL—RTX 的方法，并給出了一個(gè)簡(jiǎn)單的多任務(wù)應(yīng)用設(shè)計(jì)。 關(guān)鍵詞：MDK RTX，Cortex，嵌入式，ARM， STM32F103VB 1 MDK RL—RTX 和COrtex—M3 概述 MDK 開(kāi)發(fā)套件源自德國(guó)Keil 公司，是ARM 公司目前最新推出的針對(duì)各種嵌入式處理器 的軟件開(kāi)發(fā)工具。MDKRL—IUX 是一個(gè)實(shí)時(shí)操作系統(tǒng)(RTOS)內(nèi)核，完全集成在MDK 編譯器中。廣泛應(yīng)用于ARM7、ARM9 和Cortex-M3 設(shè)備中。它可以靈活解決多任務(wù)調(diào)度、維護(hù)和時(shí)序安排等問(wèn)題。基于RL—I 訂X 的程序由標(biāo)準(zhǔn)的C 語(yǔ)言編寫(xiě)，由Real—View 編譯器進(jìn)行編譯。操作系統(tǒng)依附于C 語(yǔ)言使聲明函數(shù)更容易，不需要復(fù)雜的堆棧和變量結(jié)構(gòu)配置，大大簡(jiǎn)化了復(fù)雜的軟件設(shè)計(jì)，縮短了項(xiàng)目開(kāi)發(fā)周期。
標(biāo)簽： COrtex-M MDK RTX 多任務(wù)
上傳時(shí)間： 2014-12-23
上傳用戶(hù)：Yue Zhong
Abstract: We don't expect manufacturers to produce clothes that in one size that fits everyone. In thesame way, one ESD component can't solve all issues—each application has different ESD requirements.Knowing that "one size fits all" cannot apply to power design, the power designer, or the engineering"super hero," must consider all the potential disruptions to a steady flow of power and thenvarious waysto mitigate them. This tutorial describes voltage- and current-limiting devices and risetime reducers tomanage the power. It also points to free and low-cost software tools to help design lowpass filters, checkcapacitor self-resonance, and simulate circuits.
標(biāo)簽： 電源工程師 電路設(shè)計(jì)
上傳時(shí)間： 2013-11-18
上傳用戶(hù)：zhouxuepeng1
Abstract: Rail splitting is creating an artificial virtual ground as a reference voltage. It is used to set the signalto match the op amp's "sweet spot." An op amp has the most linear- and distortion-free qualities at that sweetspot. Typically, the sweet spot occurs near the center between the single power rail and ground. In the case ofa number of signals, the virtual ground can control channel DC errors when multiplexing or switching thesignals.
標(biāo)簽： 電源調(diào)整 虛擬地
上傳時(shí)間： 2013-10-23
上傳用戶(hù)：wushengwu
An essential component of a noise-free audio device isa clean power supply, but few switching regulators canoperate at high efficiency while keeping the switchingfrequency out of the audio band. The LTC®3620 fills thisvoid. It is a high efficiency 15mA buck regulator with aprogrammable minimum switching frequency, making itpossible to virtually eliminate audible switching noise. Theinternal synchronous switches and low quiescent currentof this buck regulator provide the ability to maintain highefficiency, while its small footprint makes it ideal for tiny,low power audio applications.
標(biāo)簽： 超低功率 控制 開(kāi)關(guān)噪聲 方案
上傳時(shí)間： 2013-10-21
上傳用戶(hù)：非衣2016
Photomultipliers (PMT), avalanche photodiodes (APD),ultrasonic transducers, capacitance microphones, radiationdetectors and similar devices require high voltage,low current bias. Additionally, the high voltage must bepristinely free of noise; well under a millivolt is a commonrequirement with a few hundred microvolts sometimesnecessary. Normally, switching regulator confi gurationscannot achieve this performance level without employingspecial techniques. One aid to achieving low noise is thatload currents rarely exceed 5mA. This freedom permitsoutput fi ltering methods that are usually impractical
標(biāo)簽： DCDC 高電壓 低噪音 轉(zhuǎn)換器
上傳時(shí)間： 2013-10-28
上傳用戶(hù)：lhw888
Features: High efficiency, high reliability, low cost AC input range selected by switch 100% full load burn-in test Protections: Short circuit / Over load Fixed switching frequency at 25KHz Cooling by free air convection 1 year warranty Dimensions: 199*98*38mm (L*W*H)
標(biāo)簽： Switchin Output Single SKS
上傳時(shí)間： 2013-10-30
上傳用戶(hù)：taa123456
rtos的一份簡(jiǎn)單的介紹。告訴我們?nèi)绾问褂盟?/p>
標(biāo)簽： Small_RTOS C51 51 12
上傳時(shí)間： 2014-12-24
上傳用戶(hù)：腳趾頭
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