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A completely integrated 2.4 GHz low-power low-phase-noise voltage-controlled oscillator (VCO) was implemented in a standard 0.18 μm single-poly, 6-metal mixed-signal CMOS process. It employs junction varactors as voltage-controlled capacitances along with on-chip spiral inductors to form the LC-tank. The VCO-core draws 1.8 mA of current from a 1.2 V supply. Simulated phase noise is shown as -101.9 dBc/Hz at a 100 kHz offset from the carrier frequency of 2.4 GHz, and -122.1 dBc/Hz at a 1MHz offset. Comparison shows that this design has better performance than previously published similar results. This circuit is in process of being fabricated through the MOSIS Educational Program.
Circuits and Systems, 2004. ISCAS '04. Proceedings of the 2004 International Symposium on (Volume:4 )
Date of Conference: 23-26 May 2004