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1. 发明授权

US06727769B2 Crystal oscillator circuit using CMOSFETs 有权
标题翻译：使用CMOSFET的晶体振荡器电路
公开(公告)号：US06727769B2
公开(公告)日：2004-04-27
申请号：US10157999
申请日：2002-05-31
申请人： Katsuyoshi Aihara , Ryoji Iwakura , Takakazu Yano , Yukio Otaka , Shinichi Komine
发明人： Katsuyoshi Aihara , Ryoji Iwakura , Takakazu Yano , Yukio Otaka , Shinichi Komine
IPC分类号： H03B532
CPC分类号： H03B5/364 , H03B5/06
摘要： A crystal oscillator circuit using CMOSFETs including an oscillator circuit that is constructed of a resonating section and an amplifying section having a CMOSFET, a reference current source circuit for generating a reference current which determines a bias current of the amplifying section, and a control signal generator circuit for controlling the reference current source circuit to make a bias current larger than that in the oscillation status when the oscillator circuit is in the non-oscillation status. As a result, the reference current source circuit constant-current biases the DC bias of the amplifying section without depending on the source voltage. Therefore, it can lower the driving source voltage of the oscillator circuit. Further, only the bias current of the amplifying section is increased during the oscillation starting period of the oscillator circuit, so that the oscillator circuit can provide a stable oscillation with low power, without variations in the source voltage.
摘要翻译：一种使用CMOSFET的晶体振荡器电路，包括由谐振部分和具有CMOSFET的放大部分构成的振荡器电路，用于产生确定放大部分的偏置电流的参考电流的参考电流源电路，以及控制信号发生器用于控制参考电流源电路以在振荡器电路处于非振荡状态时使偏置电流大于振荡状态时的偏置电流。因此，参考电流源电路恒流偏置放大部分的直流偏压而不依赖于源极电压。因此，可以降低振荡电路的驱动源电压。此外，在振荡电路的振荡开始期间，只有放大部分的偏置电流增加，使得振荡器电路能够以低功率提供稳定的振荡，而不会使源极电压发生变化。

2. 发明授权

US06301198B1 Electronic timepiece 有权
标题翻译：电子钟表
公开(公告)号：US06301198B1
公开(公告)日：2001-10-09
申请号：US09367088
申请日：1999-08-09
申请人： Yukio Otaka , Rikoku Nakamura , Shigeru Morokawa
发明人： Yukio Otaka , Rikoku Nakamura , Shigeru Morokawa
IPC分类号： G04B100
CPC分类号： G04C10/02
摘要： In an electronic timepiece, in which electric power generated by a solar cell (101) is accumulated in an accumulator device (104) and a time keeping means (105) is driven with the accumulated electric power, an electrically on-off controllable switch (102) is provided in a circuit for charging the accumulator device (104) by the solar cell (101), a voltage comparison means (103) intermittently brings the switch (102) into the off-state at predetermined intervals and compares the generated voltage (Vs) by the solar cell and the accumulated voltage (Vb) in the accumulator device (104), and keeps the switch (102) in the off-state as it is when Vs≦Vb and brings the switch (102) into the on-state when Vs>Vb in accordance with the comparison result. Thereby, a reverse flow of an electric current from the accumulator device (104) can be prevented and a voltage drop on charging is eliminated, resulting in enhancement in charging efficiency.
摘要翻译：在由太阳能电池（101）产生的电力蓄积在蓄电装置（104）中的电子钟表中，并且用累积的电力驱动时间保持装置（105），电开关可控开关 102）设置在用于由太阳能电池（101）对蓄电装置（104）充电的电路中，电压比较装置（103）以预定间隔间歇地使开关（102）进入断开状态，并将发电电压（Vs）和累积装置（104）中的累积电压（Vb），并且当Vs <= Vb时使开关（102）保持关闭状态，并使开关（102）进入根据比较结果，Vs> Vb时的导通状态。因此，可以防止来自蓄电装置（104）的电流的反向流动，并且消除充电时的电压降，导致充电效率的提高。

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