Patent ID: 7123678

Claim:
A return-to-zero (RZ) recovery system comprising: first recovery unit configured to receive a data signal and identify a first type of data transition and determine a first phase information when the first type of data transition is identified; second recovery unit configured to receive the data signal and identify a second type of data transition and determine second phase information when the second type of data transition is identified; and wherein the first recovery unit generates a first recovered clock signal based on the determined first phase information and the second recovery unit generates a second recovered clock signal based on the determined second phase information; and further comprising an interpolator configured to generate a third recovered clock signal based on the first recovered clock signal and the second recovered clock signal; and wherein the data signal is a RZ data signal and the system further comprises a sampling unit and a filter, the filter configured to convert the RZ data signal into a non-return-to-zero (NRZ) data signal and provide the NRZ data signal to the sampling unit.