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全差分放大器THS4121的一个瞬态分析仿真的疑问?

Other Parts Discussed in Thread: THS4121, TINA-TI, THS4521, LMH3401

辈:

您好!我用TNIA-TI做全差分THS4121芯片瞬态仿真时遇到一个问题,反馈电阻Rf在大于100欧姆时,THS4121芯片输入Vin+和Vin-始终存在共模震荡,进而引起输出差分Vod有震荡,详细仿真情况,请查看附件,THS4121 TINA-TI仿真模型库是从TI官网上下载的,现怀疑芯片震荡是否真的存在,还是芯片仿真模型库有问题?

THS4121瞬态仿真分析报告A.docx