急求一个基本问题
时间：10-02
整理：3721RD
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请问为什么说噪声信号放大之后会淹没有用信号，输入信号和噪声不是同时经过一个放大倍数放大的吗?
Typically what we care is SNR. After certain amplification gain, the signal will not grow (or will be compressed or limited by power supply, etc.) but noise amplification continues. As a result, SNR drops. Also, all amplification circuits add noise.
谢谢啦
谢谢啦~