Invention Grant
- Patent Title: Electronic clock
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Application No.: US14415735Application Date: 2013-07-23
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Publication No.: US09612579B2Publication Date: 2017-04-04
- Inventor: Yu Takyo , Masaaki Namekawa
- Applicant: CITIZEN HOLDINGS CO., LTD. , CITIZEN WATCH CO., LTD.
- Applicant Address: JP Tokyo
- Assignee: CITIZEN WATCH CO., LTD.
- Current Assignee: CITIZEN WATCH CO., LTD.
- Current Assignee Address: JP Tokyo
- Agency: Hubbs, Enatsky & Inoue PLLC
- Priority: JP2012-162895 20120723
- International Application: PCT/JP2013/069952 WO 20130723
- International Announcement: WO2014/017502 WO 20140130
- Main IPC: G04C3/14
- IPC: G04C3/14 ; H02P8/02 ; H02P8/08 ; H02P8/18 ; H02P8/22

Abstract:
Provided is an electronic clock which is capable of finely controlling a driving force of a normal driving pulse and suppresses variation in current consumption without an increase in circuit size. The electronic clock is configured so that while a chopped driving pulse is output and in an interval in which coil terminals have heretofore been short-circuited, a pulse is output (hereinafter referred to as adjustment pulse) for control from a terminal that is different from a terminal of a motor driver from which the normal driving pulse has been output. The output pattern of the adjustment pulse is changed with reference to a driving rank selecting circuit to increase or decrease a motor driving current and hence change the driving force.
Public/Granted literature
- US20150160619A1 ELECTRONIC CLOCK Public/Granted day:2015-06-11
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