公开(公告)号：US4117657A

公开(公告)日：1978-10-03

申请号：US748866

申请日：1976-12-10

申请人： Eisaku Shimizu

发明人： Eisaku Shimizu

IPC分类号： G04G9/00 ,  G04G3/02 ,  G04G5/04 ,  G04G9/08 ,  G04B19/24

CPC分类号： G04G3/02 ,  G04G5/045 ,  G04G9/085

摘要： An electronic timepiece calendar circuit whereby the display of at least the date is automatically effected during both leap years and non-leap years is provided. The electronic timepiece calendar circuitry includes a date counter that is indexed by a count of one from a count of one to at least 31 and thereafter is returned to a count of one to begin counting the dates of the next month. A month counter is provided for being indexed by one through a count of one to at least 12 each time the date counter is returned to a count of one and further is adapted to produce a signal representative of the count thereof. A control circuit is provided for receiving the month signal produced by the month counter and in response thereto returns the count of the day counter to one when the count of the month counter is two and the date counter is changed from 28 to 29 or from 30 to 31 depending on whether a leap year signal is applied thereto. The leap year signal is produced by year circuitry including a first year counter adapted to be indexed through a counting cycle of one to nine and a ten year counter series connected to the year counter that is adapted to be indexed through at least one odd and even counting cycle in response to each return of the month counter to a count of zero. A judging circuit is provided for detecting when the count of the year counter is zero, four and eight and the count of the 10 year counter is even, or alternatively, when the count of the year counter is two or six and the count of the 10 year counter is odd, and in response to detecting either alternative, applying a leap year signal to the control circuit.

摘要翻译： 提供一种电子钟表日历电路，其中在闰年和非闰年期间自动实现至少日期的显示。 电子钟表日历电路包括一个日期计数器，该计数器由从1的计数到至少31的计数为1，然后返回到计数1开始计数下个月的日期。 每个日期计数器返回到一个计数器，一个月计数器被提供一个通过一个计数到一个至少12个的计数，并且还适于产生一个表示其计数的信号。 提供控制电路用于接收由月计数器产生的月份信号，并且响应于此，当月计数器的计数为2并且日期计数器从28变为29或从30返回到30时，将日计数器的计数返回到1 到31，取决于是否向其施加闰年信号。 闰年信号是由年电路产生的，包括适应通过计数周期为1到9的索引的第一年计数器，以及连接到年计数器的十年计数器系列，其适于通过至少一个奇数和偶数 计数周期，以响应每个月返回的计数器为零。 提供判断电路，用于检测年计数器的计数器何时为零，四和八，十年计数器的计数为偶数，或者当年计数器的计数为二或六时， 10年计数器是奇数，并且响应于检测到任一替代方案，将闰年信号应用于控制电路。