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1.发明授权
公开(公告)号：US4282595A
公开(公告)日：1981-08-04
申请号：US106173
申请日：1979-12-21
CPC分类号： H03K23/662 , G04D7/12 , G04G13/021
摘要： A method and apparatus for adjusting the frequency of piezoelectric crystal oscillator. The effective frequency of the oscillator is adjusted (trimmed) by periodically inhibiting pulses to the divider stage.The pulse inhibit circuit includes a nonvolatile programmable read-only-memory (ROM) to store binary complement information corresponding to the number of oscillator pulses to be suppressed.A counter is periodically preset with the binary complement information and the count advances in response to oscillator pulses. The difference count between the complement number and the counter's maximum count controls the number of pulses periodically suppressed.During manufacture/assembly of the timepiece, the ROM is programmed to contain the desired complement information.
摘要翻译： 一种用于调节压电晶体振荡器频率的方法和装置。 通过周期性地将脉冲抑制到分频器级来调节（修整）振荡器的有效频率。 脉冲抑制电路包括一个非易失性可编程只读存储器（ROM），用于存储与待抑制的振荡器脉冲数相对应的二进制补码信息。 周期性地用二进制补码信息预设计数器，并且响应于振荡器脉冲计数。 补码和计数器的最大计数之间的差值计数控制周期性抑制的脉冲数。 在制造/组装时钟期间，ROM被编程为包含所需的补码信息。
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公开(公告)号：US4290130A
公开(公告)日：1981-09-15
申请号：US106174
申请日：1979-12-21
CPC分类号： G04G3/022
摘要： A method and apparatus for adjusting the frequency of a piezoelectric crystal oscillator. The effective frequency of the oscillator is adjusted (trimmed) by periodically inhibiting pulses to the divider stage.The pulse inhibit circuit includes a nonvolatile programmable read-only-memory (ROM) to store binary complement information corresponding to the number of oscillator pulses to be suppressed.A counter is periodically preset with the binary complement information and the count advances in response to oscillator pulses. The difference count between the complement number and the counter's maximum count controls the number of pulses periodically suppressed.
摘要翻译： 一种用于调节压电晶体振荡器的频率的方法和装置。 通过周期性地将脉冲抑制到分频器级来调节（修整）振荡器的有效频率。 脉冲抑制电路包括一个非易失性可编程只读存储器（ROM），用于存储与待抑制的振荡器脉冲数相对应的二进制补码信息。 周期性地用二进制补码信息预设计数器，并且响应于振荡器脉冲计数。 补码和计数器的最大计数之间的差值计数控制周期性抑制的脉冲数。
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公开(公告)号：US4279028A
公开(公告)日：1981-07-14
申请号：US83434
申请日：1979-10-10
申请人： John Lowdenslager , Alan E. Willis
发明人： John Lowdenslager , Alan E. Willis
摘要： A solid state digital watch and barometric pressure indicator having a sealed quartz crystal and a second unsealed quartz crystal which changes frequency with atmospheric pressure changes. The frequency variation of the unsealed quartz crystal is measured over a selected (interrogation) period and some number proportional to the frequency variation, which is indicative of the magnitude of atmospheric pressure change, is displayed with an appropriate sign to indicate increasing or decreasing atmospheric pressure.
摘要翻译： 具有密封石英晶体的固态数字手表和大气压力指示器和随着大气压力变化而频率变化的第二未密封石英晶体。 在选定的（询问）期间测量未密封石英晶体的频率变化，并且与指示大气压力变化的大小的频率变化成比例的一些数字以适当的符号显示，以指示大气压力的增加或减小 。
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