一种低调谐增益变化的宽带电感电容压控振荡器  

A Wideband LC-VCO with Small Tuning Gain Fluctuation

作　　者：袁路[1] 唐长文[1] 闵昊[1] 

机构地区：[1]复旦大学专用集成电路与系统国家重点实验室,上海201203

出　　处：《Journal of Semiconductors》2008年第5期1003-1009,共7页半导体学报（英文版）

基　　金：国家高技术研究发展计划资助项目(批准号:2007AA01Z282)~~

摘　　要：设计了一个应用于数字电视调谐器的宽带电感电容压控振荡器.该振荡器包含了一个开关可变电容阵列,用以抑制调谐增益的变化.整个电路采用0.18μm CMOS工艺实现.测试结果表明:压控振荡器的频率范围从1.17GHz至2.03GHz(53.8%);调谐增益从69MHz/V变化至93MHz/V,其变化幅度与最大值相比为25.8%;最差相位噪声为-126dBc/Hz@1MHz;在1.5V电源电压下,压控振荡器的功耗约为9mW.This paper presents a fully integrated wideband LC voltage-controlled oscillator （VCO） with small tuning gain fluctuation. This VCO is designed for a dual-conversion low-IF architecture （DLIF） DTV tuner. A switched varactor array is proposed to sup- press tuning gain fluctuation for the performance of the phase locked loop （PLL）. The whole VCO was implemented in a 0. 18μm CMOS process. The measured results show - 126dBc/Hz phase noise at 1MHz offset frequency. The measured tuning range is 860MHz （53. 8%） from 1.17 to 2.03GHz with the tuning gain from 69 to 93MHz/V. Power consumption is about 9mW with a 1.5V supply voltage.

关 键 词：宽带 调谐增益 开关电容阵列 开关可变电容阵列 差分调谐 压控振荡器 

分 类 号：TN752[电子电信—电路与系统]