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A 4.2 GHz sub-harmonic low-phase-noise oscillator is presented. Optimisation of phase noise has been achieved by a combination of a 2 GHz bulk acoustic wave (BAW) resonator and a differential Colpitts topology circuit adopting STMicroelectronics 0.25 μm SiGe:C BiCMOS technology. The measured phase noise is -132 dBc/Hz at 100 kHz offset while the power consumption of the core oscillator is 21 mW with a figure of merit of -211 dBc/Hz. To the authors knowledge, this sub-harmonic oscillator achieves the best phase-noise level for a BAW based oscillator at 4 GHz band.
Published in:
Electronics Letters
(Volume:47
,
Issue:
4
)
Date of Publication: February 17 2011
- Page(s):
- 239 - 240
- ISSN :
- 0013-5194
- INSPEC Accession Number:
- 11821834
- Digital Object Identifier :
- 10.1049/el.2010.3472
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 24 February 2011
- Issue Date :
- February 17 2011
- Sponsored by :
- Institution of Engineering and Technology
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