sigma

共 8 篇文章
sigma 相关的电子技术资料,包括技术文档、应用笔记、电路设计、代码示例等,共 8 篇文章,持续更新中。

24位ADC在心电图中的应用笔记

<div> Abstract: This application note describes the essential workings of an electrocardiogram (ECG). It discussesfactors that disrupt the ECG signals and make reliable, highly-accurate electrical ch

过采样∑—△ADC的原理及实现

论述了过采样&Sigma;一AADC的基本原理及结构,分析了&Sigma;一△调制器的频域传输特性和系统的信噪比,给出了实现不同的A/D转换精度必须满足的条件和用单片机实现&Sigma;一AADC的具体方法和电路.实际使用表明,该方法测量结果可靠,具有实用价值.<br /> <img alt="" src="http://dl.eeworm.com/ele/img/177094-120319154

Delta Sigma的ADC桥测量技术

<p> &nbsp;</p> <div> Sensors for pressure, load, temperature, acceleration andmany other physical quantities often take the form of aWheatstone bridge. These sensors can be extremely linearand stabl

简化精密测量的高输入阻抗ADC

<p> &nbsp;</p> <div> High input impedance and a wide input range are twohighly desirable features in a precision analog-to-digitalconverter, and the LTC&reg;2449 delta-sigma ADC has both.With just a

音频数模转换器DAC抖动的灵敏度分析

<div> Abstract: This application note describes how sampling clock jitter (time interval error or &quot;TIE jitter&quot;) affectsthe performance of delta-sigma digital-to-analog converters (DACs). Ne

揭开∑—△ADC的神秘面纱

越柬越多的应用 例如过程控制、称重等 都需要高分辨率、高集成度和低价格的ADC。 新型&Sigma; .△转换技术恰好可以满足这些要求 然而, 很多设计者对于这种转换技术并不 分了解, 因而更愿意选用传统的逐次比较ADC &Sigma;.A转换器中的模拟部分非常简单(类似j 个Ibit ADC), 而数字部分要复杂得多, 按照功能町划分为数字滤波和抽取单元 由于更接近r 个数字器件,&Sigma;

高精度Delta-Sigma A/D转换器原理及其应用

<p> 本次在线座谈主要介绍TI的高精度Delta-Sigma A/D转换器的原理及其应用,Delta-Sigma A/D转换器在称重仪器中,大量采用比例测量方法。</p> <p> <img alt="" height="257" src="http://dl.eeworm.com/ele/img/319641-1201131G326244.jpg" width="532" /></p>

了解模数转换器的噪声、ENOB

<div> 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, underst