Design of 20GHz high performance LC-VCOs in a 52GHz fT SiGe:C BiCMOS technology
The design and analysis of fully integrated 20GHz voltage controlled oscillators (VCOs) for low cost and low power communication system are presented in this paper. Two differential topographies have been studied: balanced Colpitts VCO and LC-VCO using a cross-coupled differential pair. We have focused on oscillation frequency, tuning range, phase noise, output power optimization and buffer stage specifications. SiGe:C hetero-junction bipolar transistors of a 52GHz cut-off frequency have been used and produced via a monolithic BiCMOS technology.
bicmos voltage controlled oscillator phase noise noises