求问transient noise的仿真设置

christ0426

butong,xuexi

skeyer

摘录一段原文：
Specifies whether noise is to be injected at a constant time step(fmax) or the Spectre solver time step is to be used(step).
Injecting noise at a constant time step is suitable when the value of noisefmax is larger than the bandwidth of all signals in the circuit, and simulation time step is effectively controlled by noise.
Olny one noise frequency is updated at each time step.
If the badwidth of some of the signals exceeds noisefmax, which forces the simulator to take steps smaller than noisetmin, then noise should also be injected at each time step between the regular noise updates. In this case, all noise frequencies are updated at each time step.
简而言之：选step小的那个。

jeffej

it can do SD ADC simulation?

hbliuestc

感谢分享！

liuhuigino

多谢分享

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qqlpp

   

adcer 发表于 2014-1-13 18:56
cdnshelp里都有啊，fmax是最高频率，这个值设的越高越精确，建议至少设在100G，fmin留空是不计算1/f噪声， ...

"For performance reasons, it does not make sense to set noise bandwidth much higher than the circuit bandwidth."