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(biāo)簽： Delta Sigma ADC 測量技術(shù)
上傳時間： 2013-11-13
上傳用戶：墻角有棵樹
介紹了一種用單片機控制的智能微波信號源發(fā)生器,以美國國家半導(dǎo)體公司的低功率,高性能的δ-Σ小數(shù)分頻數(shù)字鎖相環(huán)電路LMX2485和YTO為核心構(gòu)成.微波信號源的工作頻率范圍為8~14GHz,頻率分辨率為40GHz.分析了設(shè)計方案及實現(xiàn)過程中的關(guān)鍵技術(shù),給出了部分實驗結(jié)果.
上傳時間： 2013-10-20
上傳用戶：banlangen
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.
上傳時間： 2013-10-08
上傳用戶：sjy1991
eZ430-F2013 是一款完整的 MSP430 開發(fā)工具，其在小巧的便攜式 USB 棒狀盒內(nèi)提供了評估 MSP430F2013 以及完成整個項目所需的全部軟硬件。eZ430-F2013 集成了 IAR Embedded Workbench 或 Code Composer Studio 集成開發(fā)環(huán)境 (IDE)，通過選擇設(shè)計一個獨立的系統(tǒng)，或選擇分離可移動的目標(biāo)板并整合到現(xiàn)有設(shè)計中來提供完全仿真。USB 端口可為超低功耗 MSP430 提供所需的工作電源，因而無需使用外接電源。MSP430F2013 上的所有 14 個引腳都可在 MSP-EZ430D 目標(biāo)板上進行訪問，可輕松實現(xiàn)調(diào)試并與外設(shè)接口相連。此外，還可將其中的一個數(shù)字 I/O 引腳連接至可提供視覺反饋的 LED。MSP430F2013 擁有出色的 16 MIPS 性能，并高度集成了16 位 Δ-Σ 模數(shù)轉(zhuǎn)換器、16 位定時器、看門狗定時器、掉電檢測器、支持 SPI 和 I2C 的 USI 模塊，以及待機電流僅 0.5微安的 5 種低功耗模式。
標(biāo)簽： 2013 430 eZ 開發(fā)工具
上傳時間： 2013-10-24
上傳用戶：wanglf7409
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(biāo)簽： 賽靈思 電機控制 開發(fā)套件 英文
上傳時間： 2013-10-28
上傳用戶：wujijunshi
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."
上傳時間： 2013-11-06
上傳用戶：WMC_geophy
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.
上傳時間： 2015-01-03
上傳用戶：潛水的三貢
一個3階的CIC內(nèi)插濾波器，可作為delta sigma DAC升采樣率模塊，用于半帶濾波器后。
上傳時間： 2014-02-23
上傳用戶：古谷仁美
用fpga實現(xiàn)的DA轉(zhuǎn)換器，有說明和源碼，VDHL文件。 A PLD Based delta-Sigma DAC delta-Sigma modulation is the simple, yet powerful, technique responsible for the extraordinary performance and low cost of today s audio CD players. The simplest delta-Sigma DAC consists of a delta-Sigma modulator and a one bit DAC. Since, both of these components can be realized using digital circuits, it is possible to implement a low precision delta-Sigma DAC using a PLD.
標(biāo)簽： fpga DA轉(zhuǎn)換器
上傳時間： 2016-06-10
上傳用戶：bjgaofei
SIGMA-DELTA 原理 實現(xiàn)的用LPC900系列單片機的比較器實現(xiàn)16位A/D。 有詳細(xì)的說明和源代碼（匯編格式，但是可以在KEIL下的C中調(diào)用）。
標(biāo)簽： SIGMA-DELTA LPC 900 單片機
上傳時間： 2014-01-16
上傳用戶：懶龍1988
蟲蟲下載站版權(quán)所有 京ICP備2021023401號-1
