A low-phase-noise CMOS voltage-controlled oscillator( VCO) with zero-bias scheme and multi-stage filtering is presented. Sharing ground w ith fully integrated loop filter,the PM OS-only VCO achieves a zero-bias scheme...A low-phase-noise CMOS voltage-controlled oscillator( VCO) with zero-bias scheme and multi-stage filtering is presented. Sharing ground w ith fully integrated loop filter,the PM OS-only VCO achieves a zero-bias scheme,w hich prevents tuning line noise from disturbing VCO output common-mode voltage and hence minimizes phase noise caused by nonlinear C-V characteristic of varactors. Top-biased current source is optimized by multi-stage filtering to reduce 1/f flicker and thermal noise. Fabricated in TSM C 180 nm CM OS process,the proposed VCO exhibits a measured oscillation frequency of 0.85 ~ 1.45 GHz,w ith a phase noise of-121.8 ^-131.3 dBc/Hz @ 1MHz offset over the w hole band. Pow er consumption is 3.8 ~ 6.3 mW from a 1.8 V supply.展开更多
基金supported by the National Natural Science Foundation of China(grant:61234007)the sub-project of the Very Large Scale Integrated Circuits Manufacturing Equipment and Complete Technology(No.2 National Major Projects of China)(No.:2013ZX02502-001)
文摘A low-phase-noise CMOS voltage-controlled oscillator( VCO) with zero-bias scheme and multi-stage filtering is presented. Sharing ground w ith fully integrated loop filter,the PM OS-only VCO achieves a zero-bias scheme,w hich prevents tuning line noise from disturbing VCO output common-mode voltage and hence minimizes phase noise caused by nonlinear C-V characteristic of varactors. Top-biased current source is optimized by multi-stage filtering to reduce 1/f flicker and thermal noise. Fabricated in TSM C 180 nm CM OS process,the proposed VCO exhibits a measured oscillation frequency of 0.85 ~ 1.45 GHz,w ith a phase noise of-121.8 ^-131.3 dBc/Hz @ 1MHz offset over the w hole band. Pow er consumption is 3.8 ~ 6.3 mW from a 1.8 V supply.
