Patent ID: 8901978

Claim:
A signal phase adjusting loop, comprising: a multiphase generator, comprising: a ring phase shifting loop, having a plurality of output terminals and phase shifting units, for phase-shifting a delayed input clock signal to generate output clock signals with different phases, wherein the output clock signals are respectively output at different output terminals; and a phase adjusting circuit, for receiving one of the output clock signals and an input signal, to adjust a phase of the input signal to generate the delayed input clock signal according to a phase of the one of the output clock signals; wherein the phase adjusting circuit includes: a controllable delay line, for delaying the input clock signal to adjust the phase of the input signal according to a control signal; a phase detector, for directly receiving the one of the output clock signals, which has phase substantially the same as the delayed input clock signal, and for detecting phases of the one of the output clock signals and input signal, to generate a phase detecting result; and a delay control circuit, for generating the control signal according to the phase detecting result.