Patent ID: 7505541

Claim:
A multi-mode phase and data detector, comprising: phase detector operably coupled to produce phase information and transition information based on a feedback signal and a multi-level input data signal, the phase detector further including: first transparent latching block operably coupled to latch the multi-level input data signal based on the feedback signal to produce a first latched signal and operably coupled to latch the multi-level input data signal based on the feedback signal; first latching block operably coupled to latch the first latched signal based on a complimentary feedback signal to produce an odd data output signal; second transparent latching block operably coupled to latch the multi-level input data signal based on the complimentary feedback signal to produce a second latched signal and operably coupled to latch the multi-level input data signal based on the complementary feedback signal; second latching block operably coupled to latch the second latched signal based on the feedback signal to produce an even data output signal; first logic operably coupled to the first latched signal and second latched signal to produce the phase information; and second logic operably coupled to the odd data output signal and the even data output signal to produce the transition information; charge pump block operably coupled to generate an error signal based on the phase information and the transition information; controlled oscillation module operably coupled to convert the error signal into an oscillating signal; and feedback module operably coupled to generate the feedback signal based on the oscillating signal and a divider value, wherein each of the first and second transparent latching blocks produce the first and second latched signals, respectively, and further wherein each of the first and second transparent latching blocks comprises a plurality of parallel coupled latched comparators each biased to one of a plurality of bias levels.