A 10 GHz multiphase LC VCO with a ring capacitive coupling structure  

作　　者：CHEN YingMei WANG Hui YAN ShuangChao ZHANG Li 

机构地区：[1]Institute of RF-&OE-ICs,Southeast University,Nanjing 210096,China

出　　处：《Science China(Information Sciences)》2012年第11期2656-2662,共7页中国科学（信息科学）（英文版）

基　　金：supported by National Natural Science Foundation of China (Grant No. 60976029);National High Technology Research and Development Program of China (Grant No. 2011AA010301)

摘　　要：A multiphase LC voltage-controlled oscillator （VCO） with a novel capacitive coupling CL ladder filter structure is proposed in this paper and this 10 GHz eight-phase VCO is applied in clock and data recovery （CDR） circuit for 40 Gb/s optical communications system. Compared with the traditional eight-phase oscillator, this capacitive coupling structure can decrease the number of inductors to half and only of four inductors. The VCO is designed and taped out in TSMC 65 nm CMOS technology. Measurement results show the phase noise is 105.95 dBc/Hz at 1MHz offset from a carrier frequency of 10 GHz. The chip area of VCO is 480 μm×700 μm and the VCO core power dissipation is 4.8 mW with the 1.0 V supply voltage.A multiphase LC voltage-controlled oscillator （VCO） with a novel capacitive coupling CL ladder filter structure is proposed in this paper and this 10 GHz eight-phase VCO is applied in clock and data recovery （CDR） circuit for 40 Gb/s optical communications system. Compared with the traditional eight-phase oscillator, this capacitive coupling structure can decrease the number of inductors to half and only of four inductors. The VCO is designed and taped out in TSMC 65 nm CMOS technology. Measurement results show the phase noise is 105.95 dBc/Hz at 1MHz offset from a carrier frequency of 10 GHz. The chip area of VCO is 480 μm×700 μm and the VCO core power dissipation is 4.8 mW with the 1.0 V supply voltage.

关 键 词：voltage controlled oscillator （VCO） clock and data recovery （CDR） eight-phase capacitive cou-pling CL ladder filtering 

分 类 号：TN763.2[电子电信—电路与系统] TU311.3[建筑科学—结构工程]