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关于VCA810和VCA821的AGC电路疑问

Other Parts Discussed in Thread: OPA820, VCA810, VCA821

如图,两个AGC电路所接的OPA820接法是不一样的。在VCA810里面,OPA820是作为比较器的,那在VCA821里面为什么没有了后面的保持电容?,两个图里面跨接输出和反相输入端的电容不是频率补偿的作用吗?各位能不能对照这两张图给我讲解一下,谢谢了。