Title:
ELECTRONIC CLOCK
Document Type and Number:
WIPO Patent Application WO/2014/017502
Kind Code:
A1
Abstract:
The present invention provides an electronic clock that is able to finely control the driving force of a normal driving pulse and suppresses variation in current consumption, without an increase in circuit size. The electronic clock is configured to perform control in which during the outputting of a chopped driving pulse, which would have been a period in which a coil terminal is shorted in the prior art, a pulse (hereinafter, referred to as an adjustment pulse) is outputted from a terminal different from the terminal of a motor driver (8) that outputted the normal driving pulse. By causing the output pattern of the adjustment pulse to change on the basis of a driving rank selecting circuit (11), the motor driving current is caused to change and the driving force is caused to change.
Inventors:
TAKYO YU (JP)
NAMEKAWA MASAAKI (JP)
NAMEKAWA MASAAKI (JP)
Application Number:
PCT/JP2013/069952
Publication Date:
January 30, 2014
Filing Date:
July 23, 2013
Export Citation:
Assignee:
CITIZEN HOLDINGS CO LTD (JP)
CITIZEN WATCH CO LTD (JP)
CITIZEN WATCH CO LTD (JP)
International Classes:
G04C3/14; H02P8/02
Foreign References:
| JPS5644876A | 1981-04-24 | |||
| JPS5777984A | 1982-05-15 | |||
| JPH07120567A | 1995-05-12 | |||
| JPH0833457B2 | 1996-03-29 | |||
| JPH0142395B2 | 1989-09-12 | |||
| JPH09266697A | 1997-10-07 |
Other References:
See also references of EP 2876508A4
Attorney, Agent or Firm:
HARUKA PATENT & TRADEMARK ATTORNEYS (JP)
Patent business corporation far international patent firm (JP)
Patent business corporation far international patent firm (JP)
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