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OPA855谐振问题

Other Parts Discussed in Thread: OPA855

 OPA855作为跨导使用,电路设计时,预留了4V单路电源供电和正负2.5V电源供电,无论使用何种方式供电,怎么调整RF和CF均有高频谐振,调整RF和CF谐振会在1.8GHZ 和3GHZ范围内移动。请高手指导一下是什么原因,原理图如下: