一种带有开关电流源的低相噪压控振荡器  

A low phase noise VCO with switched current source

作　　者：吕志强[1] 陈岚[1] 

机构地区：[1]中国科学院微电子研究所,北京100029

出　　处：《太赫兹科学与电子信息学报》2014年第3期466-470,共5页Journal of Terahertz Science and Electronic Information Technology

基　　金：国家科技重大专项支持SiGe-BiCMOS产品平台开发课题(2009ZX02303-04)

摘　　要：提出一种带有开关电流源的电感电容压控振荡器(LC VCO)。该技术通过反馈电容将电感电容压控振荡器的输出耦合到电流源,形成了电流源的开关特性,从而减小了电感电容压控振荡器的相位噪声。提出的电感电容压控振荡器采用华虹NEC的0.18μm SiGe BiCMOS工艺,工作频率为5.7 GHz,相位噪声为-113.0 dBc/Hz@1MHz,功耗为2.3 mA。在其他性能相同的情况下,提出的电感电容压控振荡器的振荡频率比典型的电感电容压控振荡器的相位噪声小4.5 dB。An Lnductor-Capacitor Voltage-Controlled Oscillator（LC VCO） with the switched current source circuit is proposed. The switched current source circuit is built by the coupling capacitors between the resonant circuit and the current source circuit, and then the phase noise of the proposed LC VCO is decreased. The proposed LC VCO is implemented in the Huahong NEC SiGe 0.18 μm BiCMOS process, and its oscillation frequency is 5.70 GHz and phase noise is -113.0 dBc/Hz@1MHz with 2.3 mA DC current consumption. The measured results demonstrate that the phase noise of the proposed LC VCO is reduced by 4.5 dB compared to that of the typical LC VCO under the same conditions.

关 键 词：电感电容压控振荡器 开关电流源 振荡频率 相位噪声 

分 类 号：TN752[电子电信—电路与系统]