Experimental comparison of coupling effects on the performance of quadrature CMOS LC and RC oscillators


RC oscillators are known for their high phase noise compared with LC oscillators. However, by increasing coupling in RC oscillators one can obtain a quadrature oscillator with noise performance and quadrature error comparable with that of LC coupled oscillators. Measurements were performed on 5 GHz LC and RC quadrature oscillators built in 0.18 mum… (More)

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