Invention Grant
- Patent Title: Stepping motor control circuit and analog electronic timepiece
- Patent Title (中): 步进电机控制电路和模拟电子表
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Application No.: US13065664Application Date: 2011-03-25
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Publication No.: US08698443B2Publication Date: 2014-04-15
- Inventor: Takanori Hasegawa
- Applicant: Takanori Hasegawa
- Applicant Address: JP
- Assignee: Seiko Instruments Inc.
- Current Assignee: Seiko Instruments Inc.
- Current Assignee Address: JP
- Agency: Adams & Wilks
- Priority: JP2010-071070 20100325
- Main IPC: G05B19/40
- IPC: G05B19/40

Abstract:
A stepping motor control circuit and an analog electronic timepiece which can detect a rotation state including intermediate stopping more accurately are provided. A rotation detection circuit, in detecting whether or not an induction signal generated by the rotation of a stepping motor exceeds a predetermined reference threshold voltage during a detection period having a plurality of sections, detects whether or not the induction signal with inverted polarity exceeds a predetermined reference threshold voltage during a predetermined section, and a control unit immediately performs a drive control of the stepping motor with a correction drive pulse when it is determined that there is a sign of intermediate stopping of the stepping motor based on a result of detection by the rotation detection circuit.
Public/Granted literature
- US20110235472A1 Stepping motor control circuit and analog electronic timepiece Public/Granted day:2011-09-29
Information query
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