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A varactorless VCO with 15% continuous frequency tuning range and 0.2 Db output power variation

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3 Author(s)
Ying Chen ; Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore, Singapore, Singapore ; Mouthaan, K. ; Geurts, M.

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.

Published in:

Microwave Integrated Circuits Conference (EuMIC), 2010 European

Date of Conference:

27-28 Sept. 2010