一种用于电荷泵锁相环的电荷泵

A Charge Pump for Charge Pump Phase Locked Loop

基于SMIC 0.18μm CMOS工艺,采用自偏置共源共栅电流镜和正反馈技术,设计了一种用于电荷泵锁相环的电荷泵。仿真结果显示,所设计的电荷泵能实现正常的充放电功能;在0.42V到1.22V输出电压范围内充放电电流的误差小于1%。

A charge pump for charge pump phase locked loop is designed by adopting these techniques of self-cascode current mirror and positive feedback in SMIC 0.18μm CMOS. Simulation results showed that the designed charge pump can realize the characterize of charging and discharging.The error of charging and discharging current is less than 1% when the output voltage is in the range of 0.42 V to 1.22 V.