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关于放大器的频带尖峰!

Other Parts Discussed in Thread: VCA821, OPA657

最近照着芯片资料分别做了OPA657和VCA821两款放大器,但是都出现频带出现尖峰,当频率100K到15M就出现增益增加的情况,波动大概有1DB,15M后就开始衰减。这是PCB布局的问题吗?