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电子线路的噪声分析是了解器件和电路噪声性能、研制低噪声器件、合理设计低噪声电路的基础,目前能够计算电路噪声的程序,如著名的SPICE程序,专门计算噪声的NOISE程序以及文献[3]给出的程序等,它们都是借用小信号分析部分,即采用正弦符号相量法,噪声是振幅、相位都是随机的时间函数,即是随机过程,因此,电路总噪声计算(如输出噪声、等效输入噪声)必须首先对每个噪声源的贡献单独进行计算,然后,把所有噪声贡献求平方和再开
Electronic circuit noise analysis is to understand the noise performance of devices and circuits, the development of low-noise devices, reasonable design of low-noise circuit based on the current program to calculate the circuit noise, such as the famous SPICE program, noise-specific NOISE program and literature [3 ] Are given, and so on. They all borrow the small signal analysis part, that is, using the sinusoidal phasor method, the noise is the amplitude and the phase is a random time function, that is, the random process. Therefore, the total circuit noise calculation Noise, Equivalent Input Noise) The contributions of each noise source must first be calculated separately and then all noise contributions are squared and re-opened