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A 12-GHz Fully Integrated Cascode CMOS 
VCO With 
-Enhancement Circuit
A 12-GHz Fully Integrated Cascode CMOS
A fully integrated complementary metal oxide semiconductor (CMOS) cascode LC voltage controlled oscillator (VCO) with Q-enhancement technique has been designed for high frequency and low phase noise. The symmetrical cascode architecture is implemented with negative conductance circuit for improving phase noise performance in 0.18 mum CMOS technology. The measured phase noise is -110.8 dBc/Hz at the offset frequency of 1 MHz. The tuning range of 630 MHz is achieved with the control voltage from 0.6 to 1.4 V. The VCO draws 4.5 mA in a differential core circuit from 1.8 V supply.
Published in:
Microwave and Wireless Components Letters, IEEE
(Volume:18
,
Issue:
2
)
Date of Publication: Feb. 2008
- Page(s):
- 133 - 135
- ISSN :
- 1531-1309
- INSPEC Accession Number:
- 9794263
- Digital Object Identifier :
- 10.1109/LMWC.2007.915136
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 07 February 2008
- Issue Date :
- Feb. 2008
- Sponsored by :
- IEEE Microwave Theory and Techniques Society
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