Invention Grant
- Patent Title: Stepping motor control circuit, semiconductor device, and analog electronic timepiece
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Application No.: US14735432Application Date: 2015-06-10
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Publication No.: US09729095B2Publication Date: 2017-08-08
- Inventor: Osami Yamada
- Applicant: SEIKO EPSON CORPORATION
- Applicant Address: JP Tokyo
- Assignee: Sieko Epson Corporation
- Current Assignee: Sieko Epson Corporation
- Current Assignee Address: JP Tokyo
- Agency: Global IP Counselors, LLP
- Priority: JP2014-154611 20140730
- Main IPC: G04C3/14
- IPC: G04C3/14 ; H02P8/06 ; H02P8/02

Abstract:
A stepping motor control circuit includes a drive pulse generation section that generates forward-rotation drive pulses that drive a stepping motor stepwise in a forward rotation direction and reverse-rotation drive pulses that drive the stepping motor stepwise in a reverse rotation direction and a forward/reverse rotation switching control section that switches the drive pulses outputted to the stepping motor from one of the forward-rotation drive pulses and the reverse-rotation drive pulses to the other, and the forward/reverse rotation switching control section switches the drive pulses outputted to the stepping motor from one of the forward-rotation drive pulses and the reverse-rotation drive pulses to the other and then provide a predetermined period before the other drive pulses are outputted to the stepping motor.
Public/Granted literature
- US20160033939A1 STEPPING MOTOR CONTROL CIRCUIT, SEMICONDUCTOR DEVICE, AND ANALOG ELECTRONIC TIMEPIECE Public/Granted day:2016-02-04
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