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Sigma-Delta

  • 簡化精密測量的高輸入阻抗ADC

      High input impedance and a wide input range are twohighly desirable features in a precision analog-to-digitalconverter, and the LTC®2449 delta-sigma ADC has both.With just a few external components, the LTC2449 formsan exceptional measurement system with very high inputimpedance and an input range that extends 300mV beyondthe supply rails.

    標簽: ADC 精密測量 高輸入阻抗

    上傳時間: 2013-11-02

    上傳用戶:ywcftc277

  • Delta Sigma的ADC橋測量技術

      Sensors for pressure, load, temperature, acceleration andmany other physical quantities often take the form of aWheatstone bridge. These sensors can be extremely linearand stable over time and temperature. However, mostthings in nature are only linear if you don’t bend them toomuch. In the case of a load cell, Hooke’s law states that thestrain in a material is proportional to the applied stress—as long as the stress is nowhere near the material’s yieldpoint (the “point of no return” where the material ispermanently deformed).

    標簽: Delta Sigma ADC 測量技術

    上傳時間: 2013-11-13

    上傳用戶:墻角有棵樹

  • 如何選擇補償的硅壓力傳感器

    Abstract: This reference design provides design ideas for a cost-effective, low-power liquid-level measurement dataacquisition system (DAS) using a compensated silicon pressure sensor and a high-precision delta-sigma ADC. Thisdocument discusses how to select the compensated silicon pressure sensor, suggest system algorithms, and providenoise analyses. It also describes calibration ideas to improve system performance while also reducing complexity andcost.

    標簽: 如何選擇 補償 硅壓力傳感器

    上傳時間: 2013-10-08

    上傳用戶:sjy1991

  • 賽靈思電機控制開發套件簡介(英文版)

      The power of programmability gives industrial automation designers a highly efficient, cost-effective alternative to traditional motor control units (MCUs)。 The parallel-processing power, fast computational speeds, and connectivity versatility of Xilinx® FPGAs can accelerate the implementation of advanced motor control algorithms such as Field Oriented Control (FOC)。   Additionally, Xilinx devices lower costs with greater on-chip integration of system components and shorten latencies with high-performance digital signal processing (DSP) that can tackle compute-intensive functions such as PID Controller, Clark/Park transforms, and Space Vector PWM.   The Xilinx Spartan®-6 FPGA Motor Control Development Kit gives designers an ideal starting point for evaluating time-saving, proven, motor-control reference designs. The kit also shortens the process of developing custom control capabilities, with integrated peripheral functions (Ethernet, PowerLink, and PCI® Express), a motor-control FPGA mezzanine card (FMC) with built-in Texas Instruments motor drivers and high-precision Delta-Sigma modulators, and prototyping support for evaluating alternative front-end circuitry.

    標簽: 賽靈思 電機控制 開發套件 英文

    上傳時間: 2013-10-28

    上傳用戶:wujijunshi

  • 高精度溫度測量鉑電阻溫度探測器(PRTDs)和??ADC

    Abstract: Many modern industrial, medical, and commercial applications require temperature measurements in the extended temperature rangewith accuracies of ±0.3°C or better, performed with reasonable cost and often with low power consumption. This article explains how platinumresistance temperature detectors (PRTDs) can perform measurements over wide temperature ranges of -200°C to +850°C, with absolute accuracyand repeatability better than ±0.3°C, when used with modern processors capable of resolving nonlinear mathematical equation quickly and costeffectively. This article is the second installment of a series on PRTDs. For the first installment, please read application note 4875, "High-Accuracy Temperature Measurements Call for Platinum Resistance Temperature Detectors (PRTDs) and Precision Delta-Sigma ADCs."

    標簽: PRTDs ADC 高精度 溫度測量

    上傳時間: 2013-11-06

    上傳用戶:WMC_geophy

  • ADC簡化測量高阻抗傳感器

      Delta-sigma ADCs, with their high accuracy and high noiseimmunity, are ideal for directly measuring many typesof sensors. Nevertheless, input sampling currents canoverwhelm high source impedances or low-bandwidth,micropower signal conditioning circuits. The LTC®2484family of delta sigma converters solves this problem bybalancing the input currents, thussimplifying or eliminatingthe need for signal conditioning circuits.

    標簽: ADC 測量 傳感器 高阻抗

    上傳時間: 2015-01-03

    上傳用戶:潛水的三貢

  • int trace (int i, int j, int low, IMAGE im,IMAGE mag, IMAGE ori) float gauss(float x, float sigma) f

    int trace (int i, int j, int low, IMAGE im,IMAGE mag, IMAGE ori) float gauss(float x, float sigma) float dGauss (float x, float sigma) float meanGauss (float x, float sigma) void hysteresis (int high, int low, IMAGE im, IMAGE mag, IMAGE oriim) void canny (float s, IMAGE im, IMAGE mag, IMAGE ori)

    標簽: IMAGE float int gauss

    上傳時間: 2015-01-30

    上傳用戶:杜瑩12345

  • librsync 是一個運行在Linux下的remote-delta算法庫

    librsync 是一個運行在Linux下的remote-delta算法庫,該算法可以通過網絡使遠程文件快速即時的更新,而無須發送端有文件的新舊版本。這個算法庫可以嵌入到不同的應用程序中。

    標簽: remote-delta librsync Linux 運行

    上傳時間: 2015-03-15

    上傳用戶:zhouli

  • 這是一個SIGMA方案的PMP播放器的UCLINUX程序,可播放DVD,VCD,CD MP3...有很好的參考價值.

    這是一個SIGMA方案的PMP播放器的UCLINUX程序,可播放DVD,VCD,CD MP3...有很好的參考價值.

    標簽: UCLINUX SIGMA PMP DVD

    上傳時間: 2015-03-30

    上傳用戶:ynwbosss

  • 以matlab編寫的pi-sigma模糊神經網絡程序

    以matlab編寫的pi-sigma模糊神經網絡程序

    標簽: pi-sigma matlab 編寫 模糊神經網絡

    上傳時間: 2015-08-03

    上傳用戶:a673761058

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