CLOCK DATA RECOVERY SYSTEMS AND METHODS FOR DIRECT DIGITAL SYNTHESIZERS

摘要

A system and method for clock data recovery for programming direct digital synthesizers is disclosed. A counter (410) is used to calculate a coarse measurement of the clock frequency of a received digital signal (102), and a tap delay line (606) is used to calculate a fine measurement of the clock frequency of the received digital signal. The coarse and fine measurements are used to calculate a value for programming a direct digital synthesizer to produce a clock signal that is an approximate replica of the clock frequency of the received digital signal (102).