Copy From other's Blog: http://www.eetop.cn/blog/html/16/62416-23333.html http://www.eetop.cn/blog/html/03/6503-21032.html Q: We can see the parameter Vdsat in Cadence Spectre after we perform. the DC simulation. But I can't figure out what's the physical meaning of it? I guess ...
当VBPX=VBP0时,会有一个奇怪的pole-zero pair,对AC特性有很大影响。特别是P3/P4的面积很大时。估计是通过P3/P4的CGD coupling到VBP0,组成了一个loop。 原来在做cascode OP时,cascode管的Gate的decoupling电容不够大,也会影响AC特性。 另外,CHOP开关的阻抗和寄生也会对stb产生影响。接成具体integrator或clos ...
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