信号放大通道噪声特性的研究

Research of Noise Performance of Pre - amplifiers

通过分析滤波电路对嗓声信号的影响,提出了滤波电路的等效噪声带宽。通过对嗓声系数特性的研究,总结了前置放大电路低噪声设计准则。

The characteristics of noise passing through band pass filter (BPF) are studied. The concept of noise band width of BPF is put forward. The noise function of pre - amplifier is also studied. Some low noise circuit design criteria are con-cluded .