分立元件设计的低噪声前置放大器实用电路

Applied Circuit of Lower-Noise Preamplifier Composed by Unattached Components

根据级联网络及噪声理论,本文采用分立元件设计了一种低噪声前置放大器实用电路.测试结果表明该电路比目前市场上低噪声运放具有更低的噪声电压,是一种适于低内阻信号源较理想的低噪声前置放大器电路。

According to series-wound amplifiers and noise theory , an applied circuit of low-noise preamplifier is designed using unattached components. The result shows that the circuit has lower noise voltage than the low-noise operational amplifiers existed in the present market. It is an ideal circuit of preamolifier for the signal generator with low innet resistance.