With linear time - invariant modeling of phase noise and definition of “ effective resistor ” , we analyze the critical parameters of the circuit and calculate the value of phase noise at the 1 / f ~ 2 region 引入“有效電阻”的概念對電路的各項關(guān)鍵參數(shù)在線性時不變模型下進行理論分析和推導(dǎo),得到相位噪聲在1f2區(qū)域的理論值。