Conference Paper

An LC-VCO with one octave tuning range

Radio Electron.-LECS/IMIT, R. Inst. of Technol., Stockholm, Sweden
DOI: 10.1109/ECCTD.2005.1523125 Conference: Circuit Theory and Design, 2005. Proceedings of the 2005 European Conference on, Volume: 3
Source: IEEE Xplore


This paper presents a fully integrated low power and low phase-noise VCO, having a tuning range over one octave (1.2 GHz to 2.5 GHz). The architecture is fully differential and the differential tuning offers a common-mode rejection of 31 dB. The VCO is implemented in a 0.18μm CMOS process using a 1.8 V supply. The circuit, including the bias, consumes only 11.6 mW at 1.2 GHz oscillation frequency, the phase-noise is -129 dBc/Hz at 1 MHz frequency offset.

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