A Programmable Edge-Combining DLL With a Current-Splitting Charge Pump for Spur Suppression

Abstract

A programmable edge-combining delay-locked loop (DLL) with fast switching transient and reduced output spur is presented in this work. With 12 delay cells adopted in the DLL, the programmable frequency-multiplied output can be quickly switched between ×6, ×3, and ×2 without affecting the lock state of the DLL. Output spur is suppressed by reducing the DLL… (More)
DOI: 10.1109/TCSII.2010.2087992

Topics

13 Figures and Tables