Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Citizen Watch Co Ltd
Original Assignee
Citizen Watch Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Citizen Watch Co LtdfiledCriticalCitizen Watch Co Ltd
Priority to JP14598378ApriorityCriticalpatent/JPS5572887A/ja
Priority to US06/096,450prioritypatent/US4283783A/en
Priority to GB7941032Aprioritypatent/GB2038043B/en
Priority to DE19792947959prioritypatent/DE2947959A1/de
Publication of JPS5572887ApublicationCriticalpatent/JPS5572887A/ja
Publication of JPS627989B2publicationCriticalpatent/JPS627989B2/ja
G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
G04C3/14—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means incorporating a stepping motor
G04C3/143—Means to reduce power consumption by reducing pulse width or amplitude and related problems, e.g. detection of unwanted or missing step
Landscapes
Physics & Mathematics
(AREA)
General Physics & Mathematics
(AREA)
Electromechanical Clocks
(AREA)
Control Of Stepping Motors
(AREA)
JP14598378A1978-11-281978-11-28Pulse motor driver circuit for timepiece
GrantedJPS5572887A
(en)