This paper presents a fully integrated 4 8GHz VCO with an invention——symmetrical noise filter technique.This VCO,with relatively low phase noise and large tuning range of 716MHz,is fabricated with the 0 25μm SMIC CMOS process.The oscillator consumes 6mA from 2 5V supply.Another conventional VCO is also designed and simulated without symmetrical noise filter on the same process,which also consumes 6mA current and is with the same tuning.Simulation result describes that the first VCO’ phase noise is 6dBc/H...
【更新日期】
2005-08-19
【分类号】
TN752
【正文快照】
1 IntroductionAdvances in radio frequency (RF) communica tion systems have brought on a large increase inthe demand for communication devices such as mo bile/cellular telephones,radios,portable digital tel ecommunications, WLAN phones, and data
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