Title :
A varactorless VCO with 15% continuous frequency tuning range and 0.2 Db output power variation
Author :
Chen, Ying ; Mouthaan, Koen ; Geurts, Marcel
Author_Institution :
Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore, Singapore, Singapore
Abstract :
An LC VCO with a new varactorless frequency tuning technique is presented, which is suitable for microwave and millimetre-wave applications. The continuous frequency tuning with a small output power variation is achieved using tunable negative inductance and negative capacitance cells. Fabricated in a 0.35-μm SiGe BiCMOS process, the varactorless VCOs achieves a continuous tuning range of 15% from 1.57 GHz to 1.83 GHz, with an output power variation of 0.2 dB and a constant power consumption. The measured phase noise is -117.3 dBc/Hz and -116.7 dBc/Hz at 1 MHz offset from a 1.57 GHz and a 1.83 GHz carrier frequency respectively.
Keywords :
BiCMOS integrated circuits; Ge-Si alloys; circuit tuning; semiconductor materials; voltage-controlled oscillators; BiCMOS process; SiGe; continuous frequency tuning range; frequency 1 MHz; frequency 1.57 GHz to 1.83 GHz; microwave-wave application; millimetre-wave application; negative capacitance cell; output power variation; size 0.35 mum; tunable negative inductance; varactorless VCO; varactorless frequency tuning; voltage-controlled oscillators; Capacitance; Frequency measurement; Inductance; Power generation; Tuning; Voltage-controlled oscillators;
Conference_Titel :
Microwave Integrated Circuits Conference (EuMIC), 2010 European
Conference_Location :
Paris
Print_ISBN :
978-1-4244-7231-4