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- Title
Wide tuning range LC VCO with parallel coupled negative g<sub>m</sub> cells.
- Authors
Jung, J.; Upadyaya, P.; Heo, D.; Kim, J.‐H.; Kim, B.‐S.
- Abstract
To minimise phase noise degradation with a wide tuning range, the proposed LC voltage controlled oscillator incorporates parallel coupled negative transconductance (gm) cells. Phase noise for wide tuning range VCOs suffers from degradation of quality factor of tank inductors or tank capacitors due to their parasitic resistance. The proposed parallel coupled negative gm cells provide additional current to compensate for the loss of phase noise. The measured results show a tuning range of 25.4% and a phase noise of − 116.7 dBc/Hz at 1 MHz offset frequency at 5.87 GHz with power consumption of 1.4 mW. The figure‐of‐merit with the fractional tuning range of the VCO was − 199.9 dBc/Hz, which is the best among the latest state‐of‐the‐art wide tuning range CMOS LC VCOs.
- Publication
Electronics Letters (Wiley-Blackwell), 2013, Vol 49, Issue 8, p627
- ISSN
0013-5194
- Publication type
Article
- DOI
10.1049/el.2012.4508