一种实现自调谐频率综合器的算法和结构  

A Frequency Synthesizers Realized by Self-tuning Algorithm and Architecture

作　　者：王海永[1] 林敏[1] 李永明[1] 陈弘毅[1] 

机构地区：[1]清华大学微电子学研究所,北京100084

出　　处：《固体电子学研究与进展》2004年第4期505-509,共5页Research & Progress of SSE

基　　金：国家重点基础研究发展规划课题 (973 ) (项目编号 :G2 0 0 0 0 3 65 0 8);国家自然科学基金 (No .60 2 3 60 2 0 );国家 863项目资助

摘　　要：在集成的频率综合器中 ,工艺、温度和电源电压的变化使得频率综合器产生的中心频率和频率调谐范围与期望值发生偏移。文中指出了一种自调谐频率综合器的算法和结构 ,利用特殊结构的可编程压控振荡器和自调谐算法实现宽调谐范围的频率综合器 ,进而充分涵盖期望的输出频段。用 0 2 5 μmCMOS工艺设计了一个中心频率 2 2GHz,调谐范围为 338MHz的频率综合器 ,用于IEEE80 2 11b/g无线局域网系统的超外差收发机中 ,可以充分满足标准要求的 80MHz的调谐范围 ;给出了锁定某一目标频率时自调谐算法的具体工作过程 ,结果表明该算法和结构是正确的。The variations of the process, power supply and temperature (PVT) deviate the center frequency and frequency bandwidth from the expected values in integrated frequency synthesizer. A frequency synthesizer realized by self-tuning algorithm and architecture is presented in this paper. In order to covering the expected values enough, the frequency synthesizer with wideband tuning range is implemented by using the programmable voltage controlled oscillator (VCO) with special structure and a self-tuning algorithm. A frequency synthesizer designed by 0 25 μm CMOS process with 2 2 GHz center frequency and 338 MHz tuning range is used for superheterodyne transceiver of IEEE 802 11 b/g wireless local area network, so the tuning range can cover enough the needed tuning range which is 80 MHz in the IEEE 802 11 b/g standard. Furthermore, the realizing process using self-tuning algorithm for locking one of targeted frequencies is given in details. According to the simulation and analysis, the self-tuning algorithm and architecture are correct.

关 键 词：压控振荡器 模拟电路 频率综合器 自调谐算法 

分 类 号：TN409[电子电信—微电子学与固体电子学]