Invention Grant
- Patent Title: Phase-locked loop circuit
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Application No.: US16808559Application Date: 2020-03-04
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Publication No.: US10938394B2Publication Date: 2021-03-02
- Inventor: Chien-Wen Chen
- Applicant: REALTEK SEMICONDUCTOR CORP.
- Applicant Address: TW Hsinchu
- Assignee: REALTEK SEMICONDUCTOR CORP.
- Current Assignee: REALTEK SEMICONDUCTOR CORP.
- Current Assignee Address: TW Hsinchu
- Agency: Li & Cai Intellectual Property (USA) Office
- Priority: TW108125286 20190717
- Main IPC: H03L7/07
- IPC: H03L7/07 ; H03L7/097

Abstract:
A motor driving device includes a first hysteresis comparator, a second hysteresis comparator, a logic circuit, a control unit, and an inverter circuit. The logic circuit receives a start signal or a start completion signal to output the first output signal as a commutation signal according to the start signal, or to output the second output signal as the commutation signal according to the start completion signal, clamps the second output signal by the first output signal, stops outputting the commutation signal after the potential state of the commutation signal is changed, and unclamps the second output signal with the first output signal and outputs the commutation signal in response to a difference voltage between the first input signal and the second input signal being greater than a positive value of the first hysteresis voltage or less than a negative value of the first hysteresis voltage.
Public/Granted literature
- US20210021271A1 PHASE-LOCKED LOOP CIRCUIT Public/Granted day:2021-01-21
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