This paper presents a fully integrated 4 8GHz VCO with an invention——symmetrical noise filter *** VCO,with relatively low phase noise and large tuning range of 716MHz,is fabricated with the 0 25μm SMIC CMOS *** o...
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This paper presents a fully integrated 4 8GHz VCO with an invention——symmetrical noise filter *** VCO,with relatively low phase noise and large tuning range of 716MHz,is fabricated with the 0 25μm SMIC CMOS *** oscillator consumes 6mA from 2 5V *** 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 *** result describes that the first VCO’ phase noise is 6dBc/Hz better than the latter’s at the same offset frequency from 4 *** phase noise at 1MHz away from the carrier in this 4 8GHz VCO with symmetrical noise filter is -123 66dBc/*** design is suitable for the usage in a phase locked loop and other consumer *** is amenable for future technologies and allows easy porting to different CMOS manufacturing process.
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