Referenced Items are not available for this document.
A new concept for quadrature coupling of LC oscillators is introduced and demonstrated on a 5-GHz CMOS voltage-controlled oscillator (VCO). It uses the second harmonic of the outputs to couple the oscillators. The technique provides quadrature over a wide tuning range without introducing any increase in phase noise or power consumption. The VCO is tunable between 4.57 and 5.21 GHz and has a phase noise lower than -124 dBc/Hz at 1-MHz offset over the entire tuning range. The worst-case measured image rejection is 33 dB. The circuit draws 8.75 mA from a 2.5-V supply.
Published in:
Solid-State Circuits, IEEE Journal of
(Volume:38
,
Issue:
7
)
Date of Publication: July 2003
- Page(s):
- 1148 - 1154
- ISSN :
- 0018-9200
- INSPEC Accession Number:
- 7681801
- Digital Object Identifier :
- 10.1109/JSSC.2003.813297
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 09 July 2003
- Issue Date :
- July 2003
- Sponsored by :
- IEEE Solid-State Circuits Society
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