全集成低功耗低相位噪声差分LC压控振荡器设计

摘要

This paper describes a fully integrated differential LC VCO optimal design for Global Positioning System(GPS)application.The VC0 adopts a topology which implements complementary MOS crosS-coupied pairs with LC tank and discarding the tail current source.Considering low-power low-phase noise performance,design procedures are illustrated in this paper.Fabricated in 0.18"m TSMC RFCMOS technol-ogy,the VCO oscillates at 3.14 GHz,it consumes only 1.2 mA at 1.5 V power supply voltage.It features a phase noise of-11 3 dBc/Hz and-118 dBc/Hz at 600 kHz and 1 MHz frequency offset respectivelv.%介绍了一个针对全球定位系统接收机的全集成差分LC压控振荡器设计.该设计采用互补交叉耦合晶体管对结构,去掉了尾电流源以消除其热噪声对相位噪声的影响.考虑到低功耗低相位噪声表现,文中给出设计步骤.该设计经台积电0.18 μm射频CMOS工艺进行流片验证.在1.5 V的供电电压下,VCO振荡于3.14 GHz,仅消耗1.2 mA.在频偏600 kHz和1 MHz的情况下,其相位噪声分别为-113 dBc/Hz和-118 dBc/Hz.