请教:delta sigma 调制器如何在仿真低频噪声很大时什么原因?
it is on Matlab level or Circuit level ?
The way you get the PSD plot is correct ?
How many samples ? ...............................
Please give more information, otherwise we cannot reply
At least upload the plot you get
circuit-level带宽1K OSR=1288192个点图在公司的电脑上,没权限考不出来,运放输入噪声e-10 v 级,计算snr用的是何乐年那本书上的代码
低频闪烁噪声比较严重
according to your information, maybe because of 1/f noise and large offset
Did you use hanning window ?
Maybe you could increase no. of samples to 2^15
找到原因了,是运放噪声大,谢谢!
能问你几个问题吗,为什么我做matlab仿真的时候,调制器输出的信噪比为负值
give more information
该怎么给啊?是增加信号的频率吗?我给的信号频率已经很大了
你好,我最近也碰到类似的低频噪声很大的问题了。
不过我仿真瞬态时没有勾选TransientNoise的选项,仿真结果应该是不包含器件噪声的吧?请问您之前的仿真确定是包含器件噪声的么。
请问,您的delta sigma是几位的?运放噪声又是多少比较合适呢?