Load Characteristics of Symmetric-Load Ring VCOs

SANG Hong-shi; FANG Hai-tao; YU Meng; WANG Wen; XIE Lian-bo

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Load Characteristics of Symmetric-Load Ring VCOs

更新时间：2026-09-04

- Load Characteristics of Symmetric-Load Ring VCOs
- Vol. 28, Issue 5, Pages: 197-200(2011)
- 作者机构：
  
  华中科技大学图像识别与人工智能研究所多谱信息处理技术国家级重点实验室,武汉,430074
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2011
- 稿件说明：
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桑红石, 方海涛, 余萌, 王文, 谢连波. 环形振荡器对称负载特性分析[J]. 微电子学与计算机, 2011, 28(5): 197-200.

SANG Hong-shi, FANG Hai-tao, YU Meng, et al. Load Characteristics of Symmetric-Load Ring VCOs[J]. 2011, 28(5): 197-200.
桑红石, 方海涛, 余萌, 王文, 谢连波. 环形振荡器对称负载特性分析[J]. 微电子学与计算机, 2011, 28(5): 197-200. DOI：

SANG Hong-shi, FANG Hai-tao, YU Meng, et al. Load Characteristics of Symmetric-Load Ring VCOs[J]. 2011, 28(5): 197-200. DOI：

摘要

对称负载一经提出后

由于其对称性好、高线性度、易于实现等优点而在电荷泵锁相环压控振荡器的设计中广泛采用.文中就对称负载的I-V特性在一级近似模型下进行理论分析

并采用SMIC 0.18μm CMOS工艺库进行仿真

在一阶模型近似下的仿真结果与理论推导完全一致.此外

从影响压控振荡器性能的角度

对于对称性负载设计参数的选取给出了指导性意见.

Abstract

Because of its advantages of high linearity

good symmetry and easy to implement

symmetric load is widely used when first put forward

especially in the VCO part of the charge pump PLL design.In this paper gave a detailed analysis of the symmetric loads IV characteristics based on approximate L1 model in theory

and the simulation results were fully consistent with the theoretical analysis by using SMIC 0.18μm CMOS process.In addition

this paper

from the point of affecting the performance of VCO

gives some guidance for the design parameters selection of the symmetry load.

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