An Ultra-Low-Jitter Fast-Hopping Fractional-N PLL With LC DTC and Hybrid-Proportional Paths

An Ultra-Low-Jitter Fast-Hopping Fractional-N PLL With LC DTC and Hybrid-Proportional Paths

An Ultra-Low-Jitter Fast-Hopping Fractional-N PLL With LC DTC and Hybrid-Proportional Paths 150 150

Abstract:

This work presents an ultra-low-jitter fractional-N PLL capable of wideband fast hopping. There is an analog proportional path and a digital proportional/integral path in the PLL. The PLL is digital-path-dominant during settling and analog-path-dominant after settles; therefore, the fast-lock characteristic of the digital PLLs and the low-jitter characteristic of …

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