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给出了分析模拟相关器的噪声模型.将相关器分成不同的几个子模块后,对各模块分别计算等效噪声源.然后用理想脉冲源代替噪声源计算电路的时变传输函数,接着用傅里叶变换计算输入输出的频域关系.利用电路的对称结构合并对称的子模块可以进一步简化模型.该模型可以用来估计相关器的噪声性能.
The noise model of the analog correlator is given. After the correlator is divided into several sub-modules, the equivalent noise source is calculated for each module, then the ideal pulse source is used instead of the noise source to calculate the time-varying transfer function of the circuit, Fourier transform calculation of the input-output frequency-domain relationship.Using the symmetrical structure of the circuit to combine the symmetric sub-module can further simplify the model.The model can be used to estimate the noise performance of the correlator.