---
title: 相噪
updated: 2022-01-11 02:10:47Z
created: 2022-01-10 03:35:59Z
---

# 相噪评估
**基底噪声**：
$PN_{floor} = Floor FOM + 20 * log(Fvco/Fpd) + 10 * log(Fpd / 1Hz)$

**$1/f$ 噪声**：
$PN_{flick} = Flick FOM + 20 * log(Fvco/ 1Hz) – 10 * log(offset / 1Hz)$

**总噪声**：
$PLL_{noise} = 10 * log(10^{PN_{floor} / 10} + 10^{PN_{flick} / 10} )$