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A 12.5 GHz back-gate tuned CMOS voltage controlled oscillator

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2 Author(s)
A. Mostafa ; Microelectron. & Comput. Syst. Lab., McGill Univ., Montreal, Que., Canada ; M. El-Gamal

This paper presents the design and measurements of a 12.5 GHz CMOS VCO. The circuit is an LC oscillator using an integrated octagonal differential inductor. The VCO is fully integrated and fabricated in a standard 0.35 μm CMOS process. The frequency is tuned using the back-gate voltages of a PMOS cross-coupled differential pair. The tuning range of the VCO is 300 MHz. The maximum achieved frequency of operation is 12.5 GHz using a 3.5 V power supply. The measured phase noise at 100 MHz offset is -85 dBc/Hz. The design is optimized for high frequency operation, achieving the highest oscillation frequency for a CMOS VCO of this type to be published to date

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Electronics, Circuits and Systems, 2000. ICECS 2000. The 7th IEEE International Conference on  (Volume:1 )

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