发明名称 |
Electronic timepiece |
摘要 |
An electronic timepiece comprises a quartz oscillator, a dividing circuit, a preset circuit connected to receive and divide the output pulses of the oscillator and a control circuit. The dividing circuit includes a first counter and a second counter. The preset circuit includes a setting circuit connected to an externally actuated switch, a memory circuit memorizing the number of switching times of the setting circuit caused by actuation of the switch, and a control setting circuit for presetting the complement of the memorized content of the memory circuit in the first counter. The second counter receives outputs from flip-flops constituting the first counter and produces an output which is applied to the control circuit which in turn produces an adjustment signal to the control setting circuit. The variation of the frequency of the quartz oscillator is precisely adjusted by changing the dividing ratio of said dividing circuit.
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申请公布号 |
US4020626(A) |
申请公布日期 |
1977.05.03 |
申请号 |
US19750577166 |
申请日期 |
1975.05.14 |
申请人 |
KABUSHIKI KAISHA DAINI SEIKOSHA |
发明人 |
KUWABARA, TSUNEO;YOKOYAMA, KOUZO;KOBORI, TAKENOBU |
分类号 |
G04G3/02;(IPC1-7):G04B27/08;G04C3/00 |
主分类号 |
G04G3/02 |
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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