摘要
设计了一种应用于UHFRFID阅读器的恒定调谐增益LC-VCO。VCO采用互补交叉耦合结构实现较高电源利用效率,偏置电路采用电压调节结构有效抑制电源引入的噪声。提出创新的分布式偏置容抗管阵列,以实现恒定调谐增益。电路采用TSMCO.18μmCMOSRF工艺设计。仿真结果表明,VCO的频率调谐范围为1.61~2.03GHz,在1MHz频偏处,相位噪声为-127dBc/Hz,电源电压1.8V,电路消耗的总电流为3.4mA。电路在保证低相位噪声和低电源噪声灵敏度的同时,工作频带内调谐增益的变化控制在±7%以内。
A monolithic LC voltage controlled oscillator (VCO) with nearly constant Kvco was designed for UHF RFID reader. In this circuit, a stacked NFET-PFET differential pair was used to achieve low phase noise with high power efficiency, and a voltage regulated bias circuit was employed to suppress power supply induced noise. A novel distributed biased varactor array was proposed to achieve nearly constant Kvco. The circuit was designed based on TSMC' s 0. 18 μm CMOS RF model. Results from simulation showed that the VCO achieved a wide tuning range from 1.61 GHz to 2.03 GHz, and a phase noise of -127 dBc/Hz at 1 MHz offset from 1.8 GHz carrier, and its Kvco variation was less than ± 7 % within operating frequency of interest. The circuit consumed 3. 4 mA of current from 1.8 V supply.
出处
《微电子学》
CAS
CSCD
北大核心
2014年第1期43-46,共4页
Microelectronics
基金
中国科学院院地合作专项(Y2YH01A001)
2011工业和信息化部物联网专项基金资助项目