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Frequency Synthesizers in Communication Systems

Why Do We Need Frequency Synthesizers?. What we want:GHz oscillator at exactly the carrier frequencyWhat we have:LC-tuned and ring oscillators operate up to several GHz, worse than 10% frequency accuracyCrystal oscillators operate up to ~100 MHz, 10-100 ppm frequency stability. Need to combine

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Frequency Synthesizers in Communication Systems

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    1. Frequency Synthesizers in Communication Systems Chinh Doan Robert W. Brodersen University of California, Berkeley BWRC Retreat January 2000

    2. Why Do We Need Frequency Synthesizers? What we want: GHz oscillator at exactly the carrier frequency What we have: LC-tuned and ring oscillators operate up to several GHz, worse than 10% frequency accuracy Crystal oscillators operate up to ~100 MHz, 10-100 ppm frequency stability

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