谁能帮忙回答下ADC方面的几个基本概念？

5k宇智波

   

lizy369 发表于 2014-1-22 11:21
回复 9# sxzong_hit

您好，新手入门，想请问下您，DR的概念怎么理解呢？

我看到 描述

Dynamic RangeTypically expressed in dB, dynamic range is defined as the range between the noise floor of a device and its specified maximum output level. An ADC's dynamic range is the range of signal amplitudes which the ADC can resolve; an ADC with a dynamic range of 60dB can resolve signal amplitudes from x to 1000x. Dynamic range is important in communication applications, where signal strengths vary dramatically. If the signal is too large, it over-ranges the ADC input. If the signal is too small, it gets lost in the converter's quantization noise

但是没有公式之类的，有时有点不太直观？
DR是最大的SNR吗？
谢谢

typhoon222

   

afujian 发表于 2014-1-20 11:23
有效位和分辨率是一回事?SNR是指的输出的动态范围，DR是值得使得snr=0到最大SNR的输入范围！ ...

“DR是值得使得snr=0到最大SNR的输入范围！”
是SNR还是SNDR啊？这里不用考虑谐波的影响么？

typhoon222

   

sxzong_hit 发表于 2014-1-22 11:15
http://www.maximintegrated.com/app-notes/index.mvp/id/641
基本概念

这里边的DR只有定义，那怎么仿真呢？