Patent ID: 11879917
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Basic communication processes (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 0:
1. A phase detector comprising:
a phase shift circuit to phase-shift each of a first positive-phase signal included in a first differential signal and a first negative-phase signal included in the first differential signal, and phase-shift each of a second positive-phase signal included in a second differential signal and a second negative-phase signal included in the second differential signal;
a multiplication circuit to perform multiplication of two signals for all combinations of the first positive-phase signal included in the first differential signal and the first negative-phase signal included in the first differential signal with the second positive-phase signal phase-shifted by the phase shift circuit and the second negative-phase signal phase-shifted by the phase shift circuit, output a multiplication signal indicating a result of the multiplication, perform multiplication of two signals for all combinations of the first positive-phase signal phase-shifted by the phase shift circuit and the first negative-phase signal phase-shifted by the phase shift circuit with the second positive-phase signal included in the second differential signal and the second negative-phase signal included in the second differential signal, and output a multiplication signal indicating a result of the multiplication; and
a phase difference calculating circuit to calculate a phase difference between the first differential signal and the second differential signal using all the multiplication signals output from the multiplication circuit.