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華中科技大學學報(自然科學版) 2020, Vol. 48 Issue (10): 20-25 DOI10.13245/j.hust.201004

欄目:控制與信息工程
基于交叉耦合管線性化技術的LC-VCO
姚若河 , 王立姣 , 劉 爽 , 許澤韜
華南理工大學電子與信息學院,廣東 廣州 510641
摘要 針對電感電容壓控振蕩器(LC-VCO)中交叉耦合管非線性惡化相位噪聲的問題,提出了基于交叉耦合管線性化技術的低相位噪聲LC-VCO.該LC-VCO在經典差分LC-VCO拓撲結構基礎上增加了自啟動開關系統,并引入了基于負反饋的交叉耦合管線性化技術.自啟動開關系統能保證該LC-VCO啟動速度與經典差分LC-VCO相同.基于負反饋的交叉耦合管線性化技術降低了Groszkowski效應引起的區域相位噪聲,增大了振蕩器輸出幅度,降低了區域相位噪聲.工藝仿真結果表明:本文LC-VCO振蕩頻率為2 GHz,在10 kHz和1 MHz頻率偏移處的相位噪聲為-75.9 dBc/Hz和-121.5 dBc/Hz,比經典差分LC-VCO分別降低了6.0 dB和1.6 dB.
關鍵詞 電感電容壓控振蕩器 ;低相位噪聲 ;線性化技術 ;負反饋 ;Groszkowski效應
LC-VCO based on cross-coupled transistor linearization technology
YAO Ruohe , WANG Lijiao , LIU Shuang , XU Zetao
School of Electronic and Information Engineering,South China University of Technology,Guangzhou 510641,China
Abstract To solve the problem that the nonlinearity of cross-coupled transistor deteriorates the phase noise in inductance capacitor voltage-controlled oscillator (LC-VCO),a low phase noise LC-VCO based on cross-coupled transistor linearization technology was proposed.Based on classic differential LC-VCO topology,a self-starting switch system was introduced into the LC-VCO,and a cross-coupled transistor linearization technology based on negative feedback was also introduced into the LC-VCO.The self-starting switch system ensured that the starting speed of the LC-VCO was the same as the classic differential LC-VCO.The cross-coupled transistor linearization technology based on negative feedback improved the phase noise performance in the region caused by the Grozkowski effect,increased the output amplitude of the oscillator,and improved phase noise performance in the region.Process simulation results show that the frequency of the proposed LC-VCO is 2 GHz,and the phase noise is -75.9 dBc/Hz and -121.5 dBc/Hz at the 10 kHz and 1 MHz offset frequency,which is 6.0 dB and 1.6 dB lower than that of the classic differential LC-VCO.
Keywords inductance capacitor voltage-controlled oscillator ; low phase noise ; linearization technology ; negative feedback ; Groszkowski effect
基金資助廣東省科技計劃資助項目(2019B010143003)

中圖分類號TN752
文獻標志碼A
文章編號1671-4512(2020)10-0020-06
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文獻來源
姚若河, 王立姣, 劉 爽, 許澤韜. 基于交叉耦合管線性化技術的LC-VCO[J]. 華中科技大學學報(自然科學版), 2020, 48(10): 20-25
DOI:10.13245/j.hust.201004
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