Ja-yol Lee, Sang-Heung Lee, Hae-cheon Kim, Hyun-Kyu Yu
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A 45-to-60-GHz Two-Band SiGe: C VCO for Millimeter-Wave Applications
A 45 - 60-GHz two-band double cross-coupled differential VCO is designed and fabricated using 0.25 mum SiG:C BiCMOS process technology whose fmax is greater than 200 GHz. The VCO provides tuning ranges of 44.9 - 48.9 GHz when its bias current is 13 mA and of 58 - 60.4 GHz when a bias current of 7 mA draws into the VCO. The phase noises of the VCO are measured as - 99 dBc/Hz from 48.86 GHz and - 93 dBc/Hz from 60.32 GHz, at 10 MHz offset, respectively. The VCO shows moderate FOMs of 156 dBc at 60.32 GHz and 158 dBc at 48.86 GHz.
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