A novel method based on phase quantization is proposed in this paper to do timing synthesis such as timing recovery and jitter synthesis.The optimal performance can be achieved by Viterbi algorithm.Some practical implements of reduced complexity

namely T Viterbi and two order Sigma Delta Modulations（SDM）

are also explored.The simulation results show that the quantization error is much less than conventional simple SDM.We also use this method in jitter generation

which show great advantages.