A K-band CMOS low power modified Colpitts VCO using transformer feedback

Hsieh, C.-K.C.-K.HsiehKao, K.-Y.K.-Y.KaoTseng, J.R.J.R.TsengKUN-YOU LIN2018-09-102018-09-102009http://www.scopus.com/inward/record.url?eid=2-s2.0-77950008278&partnerID=MN8TOARShttp://scholars.lib.ntu.edu.tw/handle/123456789/349969A 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.CMOSColpitts oscillatorTransformerVCO[SDGs]SDG7A K-band CMOS low power modified Colpitts VCO using transformer feedbackconference paper10.1109/MWSYM.2009.51659412-s2.0-77950008278