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).
上传时间： 2013-11-13
上传用户：墙角有棵树
介绍了一种用单片机控制的智能微波信号源发生器,以美国国家半导体公司的低功率,高性能的δ-Σ小数分频数字锁相环电路LMX2485和YTO为核心构成.微波信号源的工作频率范围为8~14GHz,频率分辨率为40GHz.分析了设计方案及实现过程中的关键技术,给出了部分实验结果.
上传时间： 2013-10-20
上传用户：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.
上传时间： 2013-10-08
上传用户：sjy1991
eZ430-F2013 是一款完整的 MSP430 开发工具，其在小巧的便携式 USB 棒状盒内提供了评估 MSP430F2013 以及完成整个项目所需的全部软硬件。eZ430-F2013 集成了 IAR Embedded Workbench 或 Code Composer Studio 集成开发环境 (IDE)，通过选择设计一个独立的系统，或选择分离可移动的目标板并整合到现有设计中来提供完全仿真。USB 端口可为超低功耗 MSP430 提供所需的工作电源，因而无需使用外接电源。MSP430F2013 上的所有 14 个引脚都可在 MSP-EZ430D 目标板上进行访问，可轻松实现调试并与外设接口相连。此外，还可将其中的一个数字 I/O 引脚连接至可提供视觉反馈的 LED。MSP430F2013 拥有出色的 16 MIPS 性能，并高度集成了16 位 Δ-Σ 模数转换器、16 位定时器、看门狗定时器、掉电检测器、支持 SPI 和 I2C 的 USI 模块，以及待机电流仅 0.5微安的 5 种低功耗模式。
上传时间： 2013-10-24
上传用户：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.
上传时间： 2013-10-28
上传用户：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."
上传时间： 2013-11-06
上传用户：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.
上传时间： 2015-01-03
上传用户：潜水的三贡
一个3阶的CIC内插滤波器，可作为delta sigma DAC升采样率模块，用于半带滤波器后。
上传时间： 2014-02-23
上传用户：古谷仁美
用fpga实现的DA转换器，有说明和源码，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.
上传时间： 2016-06-10
上传用户：bjgaofei
SIGMA-DELTA 原理 实现的用LPC900系列单片机的比较器实现16位A/D。 有详细的说明和源代码（汇编格式，但是可以在KEIL下的C中调用）。
标签： SIGMA-DELTA LPC 900 单片机
上传时间： 2014-01-16
上传用户：懒龙1988
