Patent ID: 7973583

Claim:
An A/B-phase signal generator comprising: an up/down count unit that is configured to count up by an up-count command or count down by a down-count command at fixed intervals; an angle comparison unit that is configured to compare a count result of the up/down count unit with an input rotation angle and, based on a comparison result, generate a count request, the count request being an up-count request or a down-count request; a count request comparison unit that is configured to compare a previous count request generated by the angle comparison unit with a next count request generated by the angle comparison unit and generate the up-count command or the down-count command only when the previous count request and the next count request are both up-count requests or down-count requests, respectively; and an A/B-phase pulse generator that is configured to receive a least significant bit and a second least significant bit of the up/down count unit and generate and output an A-phase pulse signal and a B-phase pulse signal.