Patent ID: 8160192

Claim:
A system for recovering timing information from a serial data stream, comprising: a sampling circuit that produces a recovered data signal by using one or more feedback signals of a plurality of feedback signals to sample a serial data stream; and an interleaving feedback network that produces the plurality of feedback signals, comprising: a control circuit that produces control signals based on the recovered data signal; a first multiplexer that is coupled to receive a plurality of periodic signals and select an individual periodic signal based on a first control signal from the control circuit; a first delay-locked loop having a first series of delay cells that produce a plurality of delayed signals based on the selected periodic signal; a second multiplexer that is coupled to receive the plurality of delayed signals and selects an individual delayed signal as based on a second control signal from the control circuit; and a second delay-locked loop coupled with the second multiplexer and having a second series of delay cells that produces the plurality of feedback signals based on the selected delayed signal, wherein the second delay-locked loop further includes a third multiplexer that is coupled to receive a third control signal from the control circuit, the third multiplexer causing the second delay-locked loop to enter either an open mode of operation or a closed mode of operation in response to the third control signal.