| 宽带锁相环中的快速频带切换电路 |
| |
| 引用本文： | 阴亚东,陈杰,丁光彩,王海永.宽带锁相环中的快速频带切换电路[J].固体电子学研究与进展,2009,29(1). |
| |
| 作者姓名： | 阴亚东 陈杰 丁光彩 王海永 |
| |
| 作者单位： | 中国科学院微电子研究所,北京,100029 |
| |
| 摘 要： | 首先讨论了普通频带切换电路及使用它的锁相环的电路结构,指出了其存在切换频带时间较长的问题,进而提出并分析了一种改进的频带切换电路。该电路在锁相环切换频带时,产生与输入参考时钟同步的复位信号用于复位鉴频鉴相器(PFD)和环路分频器,从而加快了锁相环频带的切换。该电路基于smicRF 0.18μm 1.8V CMOS工艺设计和流片验证,测试结果显示与普通频带切换电路相比,改进的频带切换电路明显的减少了频带切换时间。
|
| 关 键 词： | 压控振荡 锁相环 开关切换电容阵列 频带切换电路 相位误差 |
A Fast Settling Band-switching Circuit in Wideband PLL |
| |
| YIN Yadong,CHEN Jie,DING Guangcai,WANG Haiyong.A Fast Settling Band-switching Circuit in Wideband PLL[J].Research & Progress of Solid State Electronics,2009,29(1). |
| |
| Authors: | YIN Yadong CHEN Jie DING Guangcai WANG Haiyong |
| |
| Institution: | Institute of Microelectronics of the Chinese Academy of Sciences;Beijing;100029;CHN |
| |
| Abstract: | The structure of normal band-switching circuit and wideband PLL are discussed in this paper. It is proposed that normal band-switching circuit suffers from long time band-switching. A new improved band-switching circuit is presented,which generates a reset signal in accord with input reference clock during the period of band-switching to reset the divider and PFD,therefore the time for band-switching of PLL is cut down. The improved circuit was designed and fabricated in SMICRF 0.18 μm 1.8 V CMOS process. The measured results show that the new circuit saves band-switching time obviously,in comparison to the normal one. |
| |
| Keywords: | VCO PLL switched-capacitor array (SCA) band-switching circuit (BSC) phase error |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
