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放大器的噪声参数

Other Parts Discussed in Thread: OPA228

1.  放大器有一个噪声密度参数是 3nV/√Hz这样的   这个是相对于1KHz的频率下测到的 ,假如说我输入的频率是100K  那是不是就是说有30NV的噪声啊?

2. 另外请问下有什么新品可以替代OPA228的吗?这个好像比较难买