A K-band CMOS low power modified Colpitts VCO using transformer feedback
Journal
IEEE MTT-S International Microwave Symposium Digest
Pages
1293-1296
Start Page
1293
End Page
1296
ISSN
0149645X
ISBN (of the container)
978-142442804-5
Date Issued
2009
Author(s)
Abstract
A K-band low-power, low phase noise modified Colpitts VCO was implemented in 0.13 μm CMOS process. The timed current switches of the conventional Colpitts VCO are replaced by a differential transformer, and thus the supply voltage of the proposed VCO can be reduced. The VCO has -100 and -109.5 dBc/Hz phase noises at 1 MHz offset under 4 and 10 mW dc power consumptions, respectively. The chip size is 570 x 570 μm2.
Event(s)
2009 IEEE MTT-S International Microwave Symposium, IMS 2009
Subjects
CMOS
Colpitts oscillator
Transformer
VCO
Type
conference paper