Fractional-N PLLs - Construction and Applications A simplified block diagram of a Fractional PLL is shown in Figure 1. Excluding the block marked Δ Σ (Delta-Sigma) Modulator, this PLL is same as a ...

This PLL can accomplish faster phase lock ... They are phase/frequency detector (PDF), gain generation unit, DCO. Fig. 2 shows the block diagram of the proposed ADPLL. A similar architecture is ...