A delay-locked loop (DLL) and a method of performing clock and data recovery. In one embodiment, the DLL includes: (1) a phase detector that generates a phase difference signal based on a phase comparison between a data signal and a mixer output signal of the DLL and (2) a quadrant controller, coupled...http://www.google.com/patents/US6586977?utm_source=gb-gplus-sharePatent US6586977 - Four quadrant analog mixer-based delay-locked loop for clock and data recovery
