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vca810放大倍数衰减

Other Parts Discussed in Thread: VCA810

我使用了一片vca810构成程控放大,但发现在输入100mv信号情况下,放大约10倍,在频率为数mhz开始明显衰减,但看资料说vca810拥有35M的恒定带宽,请问是何原因,谢谢