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What is PPM Techniques for Spur Reduction in PLLs about?

This thesis examines pulse position modulation (PPM) and its application to phase locked loops (PLLs) for reducing spurious signals. It derives closed-form expressions for the spectrum of PPM signals and provides intuitive explanations. PPM breaks the periodicity of charge pump current pulses in a PLL, redistributing reference spurs into broadband noise. This allows the PLL to have a larger bandwidth while maintaining low spur levels. The thesis also presents circuit implementations of PPM techniques and an

Author

Himanshu Varshney

Language

EN