A novel complementary Colpitts differential CMOS VCO with low phase noise performance

CC Wei, HC Chiu, YT Yang, JS Fu - Microelectronics journal, 2009 - Elsevier
A low phase noise Ka-band CMOS voltage-controlled oscillator is proposed in this paper. A
new complementary Colpitts structure was adopted in a 0.18-μm CMOS process to achieve
differential-ended outputs, low phase-noise performance, and low-power consumption. The
designed VCO oscillates from 29.8 to 30GHz with 200MHz tuning range. The measured
phase noise at 1-MHz offset is− 109dBc/Hz at 30GHz and− 105.5 dBc/Hz at 29.8 GHz. The
power consumption of VCO is only 27mW. In addition, compared with the published papers …

A novel compact complementary Colpitts differential CMOS VCO with low phase-noise performance

CC Wei, HC Chiu, YT Yang - 2008 IEEE Radio Frequency …, 2008 - ieeexplore.ieee.org
A low phase-noise Ka-band CMOS voltage-controlled oscillator is proposed in this paper.
The CMOS VCO core adopts a new complementary Colpitts structure in a 0.18-μm CMOS
technology to achieve the differential-ended outputs with low phase-noise performance, as
well as operate at much higher frequency. The VCO oscillates from 29.8 to 30 GHz with
200MHz tuning range. The measured phase-noise at 1-MHz offset is− 109 dBc/Hz at 30 GHz
and 105.5 dBc/Hz at 29.8 GHz. The power consumption of the VCO core is only 27 mW. To …
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