A clock regenerator includes a pulse generating module, a control logic module, a gating module and an output module. The pulse generating module is configured to receive a global clock signal and produce a periodic pulse signal triggered by a rising edge of the global clock signal. The control logic module is configured to receive a plurality of control signals and produce a pulse-type setting signal and a gating signal according to the periodic pulse signal and the control signals. The gating module is configured to produce an intermediate clock signal according to the pulse-type setting signal and the gating signal. The output module is configured to provide a local clock signal according to the intermediate clock signal.