@article{paperid:1029567, author = {Ebrahimi, Emad and Naseh, Sasan}, title = {A Colpitts CMOS Quadrature VCO Using Direct Connection of Substrates for Coupling}, journal = {IEEE Transactions on Very Large Scale Integration (VLSI) Systems}, year = {2013}, volume = {21}, number = {3}, month = {March}, issn = {1063-8210}, pages = {571--574}, numpages = {3}, keywords = {Current-switching Colpitts-oscillator ; low-phase noise ; multiphase ; quadrature oscillator}, }