发明名称 |
Electronic timepiece |
摘要 |
An electronic timepiece includes a frequency supply for providing a relatively high frequency time base signal, a frequency converter responsive to the time base signal to provide a relatively low frequency time unit signal, and timekeeping means responsive to the time unit signal to provide current time information. The current time information is corrected and displayed. A calculation command signal is generated and enables a circuit means to produce, in response to the time unit signal, a frequency error signal indicative of an error in the frequency of the time unit signal. A gain/loss adjustment signal is generated in response to the frequency error signal, and a frequency adjusting circuit is provided for adjusting the frequency of the time unit signal in response to the gain/loss adjustment signal.
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申请公布号 |
US4292680(A) |
申请公布日期 |
1981.09.29 |
申请号 |
US19780943262 |
申请日期 |
1978.09.15 |
申请人 |
CITIZEN WATCH COMPANY LIMITED |
发明人 |
MOROKAWA, SHIGERU;SEKIYA, FUKUO;HASHIMOTO, YUKIO;NOMURA, YASUSHI;KOGA, KEIICHIRO |
分类号 |
G04G15/00;G04C3/00;G04G3/02;G04G5/04;G04G9/00;G04G11/00;G04G13/02;G04G17/08;G04G99/00;(IPC1-7):G04C9/00;G04B17/12 |
主分类号 |
G04G15/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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