A clock recovery circuit samples an incoming data stream that includes sequences of signal transitions. A transition detector categorizes the received signal transitions into various types, such as those associated with 2PAM and 4PAM signaling schemes. Select logic control circuitry analyzes the signal-transition...http://www.google.com/patents/US20050201491?utm_source=gb-gplus-sharePatent US20050201491 - System and method for selecting optimal data transition types for clock and data recovery
