A Transformer-Based Dual-Coupled Triple-Mode CMOS LC-VCO Yu, Xiaohua ; El-Gouhary, Amany ; Neihart, Nathan M. Abstract Publication: IEEE Transactions on Microwave Theory Techniques Pub Date: September 2014 DOI: 10.1109/TMTT.2014.2332498 Bibcode: 2014ITMTT..62.2059Y