一种2.2～5.5G宽带低相位噪声LC VCO设计  

Design of LC VCO with Freguency within 2.2～5.5 GHz and Lower Phase Noise

作　　者：谷华宝[1] 吴建辉[1] 

机构地区：[1]东南大学国家专用集成电路系统研究中心,南京210096

出　　处：《电子器件》2009年第1期144-147,共4页Chinese Journal of Electron Devices

摘　　要：论文基于BiCMOS工艺,采用了8个LC VCO并列的工作模式实现了2.2~5.5 GHz的带宽范围的LC VCO,每个LC VCO可以进行单独的调节。在LC VOC的核心电路中采用电阻代替电流镜方式以及在输出处增加了两个三极管限幅,以得到较低的相位噪声。在各个LC VCO的中心频率处其相位噪声优于-96 dBc@100 kHz。当电源电压为5 V时,各个LCVCO的工作电流为3.2 mA^4.2 mA。The paper presents an 2.2～5.5 GHz wideband LC VCO,which has eight LC VCO working in apposite mode and each of which can be modulated respectively,in BiCMOS process.In the key circuit of LC VCO,resistor has been used instead current mirror and two triode transistors have been added for limiting amplitude at the output,in order to get lower phase noise.The phase noise at the Middle frequency of each of LC VCO is superior to-96 dB@100 kHz.The current of the eight LC VCO is about 3.2～4.2 mA,when the supply voltage is 5 V.

关 键 词：宽带 LC压控振荡器 相位噪声 

分 类 号：TN751[电子电信—电路与系统]