一种大电压输出摆幅低电流失配电荷泵的设计  

Charge Pump with Wide-range Output Voltage and High Current Matching Characteristics

作　　者：蒋宇俊[1] 陈东坡[1] 

机构地区：[1]上海交通大学微电子学院射频集成电路中心,上海200240

出　　处：《现代电子技术》2009年第5期153-155,共3页Modern Electronics Technique

基　　金：上海市科委浦江人才计划资助项目(07pj14060)

摘　　要：在分析了基本锁相环电荷泵工作机制的基础上，提出一种新型的电荷泵结构，该电荷泵在非常宽的电压范围内具有很低的电流失配，解决了传统电荷泵结构所具有的电荷注入、时钟馈通和电荷共享等问题，并且非常容易实现电荷泵充放电电流的数字控制。基于SMIC0．18μm CMOSRF工艺库设计的实际电路，使用Cadence工具仿真结果表明，在电源电压2．0V时，输出电压为0．3～1．63V，充放电电流最大失配率小于0．1％，电流绝对值偏移率小于0．6％，说明这种新型电荷泵结构具有良好的性能。Based on analyzing the principle of Charge Pump（CP） of PLL,a new type of CP is presented in this paper. This CP has high current matching characteristics in wide- range output voltage,overcoming the disadvantage in the traditional CP circuit,which includs charge injection,clock feedthrough,and charge sharing. This type of CP can easily control the sourcing/ sinking current digitally. The practical circuit is designed based on SMIC 0. 18um CMOSRF technology, the simulation by Cadence tools shows that at 2V supply voltage, the sourcing/sinking current＇s largest mismatch can achieve smaller than 0.1 % and the absolute mismatch of current is smaller than 0.6% when the output voltage varies from 0.3V to 1.63V,indicating that this type of CP has a good performance.

关 键 词：锁相环 电荷泵 电流失配 数字控制 

分 类 号：TN432[电子电信—微电子学与固体电子学]