| 一种高性能CMOS电荷泵的设计 |
| |
| 引用本文： | 段吉海,古鸽,秦志杰.一种高性能CMOS电荷泵的设计[J].中国集成电路,2009,18(6):31-34,15. |
| |
| 作者姓名： | 段吉海 古鸽 秦志杰 |
| |
| 作者单位： | 桂林电子科技大学信息与通信学院,广西,桂林,541004 |
| |
| 摘 要： | 设计了一种用于电荷泵锁相环的CMOS电荷泵电路。电路中采用三对自偏置高摆幅共源共栅电流镜进行泵电流镜像，增大了低电压下电荷泵的输出电阻，并实现了上下两个电荷泵的匹配。为了消除单端电荷泵存在的电荷共享问题，引入了带宽幅电压跟随的半差分电流开关结构，使电荷泵性能得以提高。设计采用0．18-μm标准CMOS工艺。电路仿真结果显示，在0．35V到1．3V范围内泵电流匹配精度达0．9％，电路工作频率达250MHz。
|
| 关 键 词： | 电荷泵 锁相环 自偏置共源共栅电流镜 电压跟随 |
Design of a High-performance CMOS Charge Pump |
| |
| DUAN Ji-hai,GU Ge,QIN Zhi-jie.Design of a High-performance CMOS Charge Pump[J].China Integrated Circuit,2009,18(6):31-34,15. |
| |
| Authors: | DUAN Ji-hai GU Ge QIN Zhi-jie |
| |
| Affiliation: | (School of Information ＆ Communication, Guilin University of electronic Technology, Guilin 541004) |
| |
| Abstract: | A CMOS charge pump for CPPLL is designed. Through the current mirror image from three blocks of the cascade current mirrors with self-bias and wide-swing, the output impedance of the circuit is increased, and the current matching is also improved. In order to reduce the charge sharing, a semi-differential-type current switch with a voltage-follower is employed. The circuits is verified with Spectre simulator in 0.18-μ m standard CMOS process, and the simulation shows that the current matching precision is up to 0.9% during 0.4V-1.3V, while the operation frequency, 250MHz. |
| |
| Keywords: | Charge pump Phase-locked loop Self-bias cascade mirrior Voltage-follower |
| 本文献已被 维普 万方数据 等数据库收录！ |
|
