Patent ID: 11870447
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Basic communication processes (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 18:
19. The phase synchronization device according to claim 1, wherein
the phase interpolator of each of the first and second elements includes:
a first frequency variable oscillation circuit to generate an output signal of the phase interpolator;
a first phase comparator to detect a phase difference between a first one of two signals input to the phase interpolator and the output signal generated by the first frequency variable oscillation circuit, and to output a signal proportional to the detected phase difference;
a second phase comparator to detect a phase difference between a second one of the two signals input to the phase interpolator and the output signal generated by the first frequency variable oscillation circuit, and to output a signal proportional to the detected phase difference;
a second adder to add the signal output from the first phase comparator and the signal output from the second phase comparator; and
a loop filter to smooth a signal resulting from the addition by the second adder, and to output the smoothed signal to the first frequency variable oscillation circuit, and
the first frequency variable oscillation circuit changes a frequency of the output signal of the phase interpolator on a basis of the signal smoothed by the loop filter.