一种用于高频频率合成器的低功耗可编程分频器  

A Low Power High-speed Programmable Divider for High Frequency Synthesizer

作　　者：刘文婷[1] 张晓林[1] 夏温博[1] 

机构地区：[1]北京航空航天大学电子信息工程学院,北京100191

出　　处：《遥测遥控》2010年第4期45-49,共5页Journal of Telemetry,Tracking and Command

摘　　要：介绍一种应用于高频频率合成器的低功耗可编程分频器。分频器由双模前置分频器及数字可编程分频器构成。提出一种新的相位开关技术,并基于此技术设计了16/17双模前置分频器,模块结构简单,可工作于吉赫兹频段。数字部分采用一种优化算法,使得其输出模式控制信号可直接控制双模前置分频器的分频比,简化了整体电路结构,提高了电路工作速度。设计基于SMIC0.18μm1P6M RF CMOS工艺实现,后仿真结果表明,电路工作频率最高可达3GHz,在1.8V供电电压、1.4GHz工作频率时,双模前置分频器的功耗仅为1.8mW。A low power high-speed programmable divider of high frequency synthesizer applied to the RF receivers is presented. A new phase-switching technique is proposed and a dual-modulus prescaler ( DMP) is built based on this technique. The DMP is of low power consumption,simple and could work at high speed. A digital programmable divider with novel output mode-ctrl signal is described. This signal could control the proposed DMP directly,which makes the work speed higher. The simulation results show that the maximum input frequency of the programmable divider is up to 3GHz and running at an input frequency of 1. 4GHz,the power consumption of the DMP is only 1. 8mW at the 1. 8V power supply voltage.

关 键 词：频率合成器 可编程分频器 双模前置分频器 相位开关 

分 类 号：TN74[电子电信—电路与系统]