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求助,困扰很久了,关于芯片的抗干扰性能

Other Parts Discussed in Thread: OPA2134, OPA197, RC4580, LM386

Ti生产了一系列具有抗干扰性能的芯片,OPA197等。按照的测试方法,发现无论TI的老芯片RC4580,还是OPA2134在高频高幅值的信号输入下,都并无直流分量输出,所以想请教下这是怎么一回事。