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    Device for detecting the end of battery life, power supply circuit having the device, and a portable machine having the power supply circuit
    4.
    发明授权
    Device for detecting the end of battery life, power supply circuit having the device, and a portable machine having the power supply circuit 失效
    用于检测电池寿命结束的装置，具有该装置的电源电路以及具有该电源电路的便携机

    公开(公告)号：US5698971A

    公开(公告)日：1997-12-16

    申请号：US654667

    申请日：1996-05-29

    申请人： Hitoshi Sahai ,  Yosiaki Suenaga ,  Hiroyuki Maeda

    发明人： Hitoshi Sahai ,  Yosiaki Suenaga ,  Hiroyuki Maeda

    IPC分类号： G01R31/30 ,  H02J7/00 ,  G05F1/40

    CPC分类号： H02J7/0031 ,  G01R31/3004 ,  Y10S320/21

    摘要： The improved device for detecting the end of battery life due to the depletion of battery power has a constant-voltage generator circuit that delivers a constant voltage until the voltage for use limit is reached. An A/D converter circuit performs A/D conversion on the constant voltage from the constant-voltage generator circuit in response to the operating power from a power supply line which decreases as the battery depletes. The device detects the end of battery life in response to the A/D converted value from the A/D converter circuit when the value of digital data obtained by conversion of the constant voltage has varied to exceed a specified level.

    摘要翻译： 用于检测由于电池电力耗尽而导致的电池寿命结束的改进的装置具有恒定电压发生器电路，其传递恒定的电压直到达到使用极限的电压。 A / D转换器电路响应来自电池线路的工作电源，从恒定电压发生器电路对恒定电压进行A / D转换，随着电池耗尽而减小。 当通过恒定电压的转换获得的数字数据的值变化到超过指定的电平时，该装置响应于来自A / D转换器电路的A / D转换值来检测电池寿命的结束。

    Battery charging circuit and electronic device including the same
    5.
    发明授权
    Battery charging circuit and electronic device including the same 失效
    电池充电电路和电子设备包括相同

    公开(公告)号：US5442275A

    公开(公告)日：1995-08-15

    申请号：US117949

    申请日：1993-09-08

    申请人： Hitoshi Sahai

    发明人： Hitoshi Sahai

    IPC分类号： H02J7/10 ,  H02J7/00 ,  H03M1/18

    CPC分类号： H02J7/008

    摘要： The constitution of a battery charging circuit uses a power source circuit which performs a charging operation for the battery, and a current-voltage converting circuit inserted in series with the battery which, when assuming the amount of charging current of the battery for the abscissa and assuming the amount of voltage obtained by converting the amount of charging current into a voltage for the ordinate, shows a first current-voltage converting characteristic having a positive inclination in a range of a charging current amount representing a condition of a charging completion and shows a second current-voltage converting characteristic having a smaller positive inclination than that for the first current-voltage converting characteristic in a range of a charging current amount exceeding the above range and converts the above charging current amount into a voltage amount, and the converted voltage amount is further A/D converted into a digital value, and an over current charging condition and a charging completion condition are respectively detected based on the digital value.

    摘要翻译： 电池充电电路的结构使用对电池进行充电操作的电源电路和与电池串联插入的电流 - 电压转换电路，当假定横轴的电池的充电电流量时， 假设通过将充电电流量转换为纵坐标的电压而获得的电压量示出了在表示充电完成状态的充电电流量的范围内具有正倾斜度的第一电流 - 电压转换特性， 在超过上述范围的充电电流量的范围内具有比第一电流 - 电压转换特性小的正倾斜度的第二电流 - 电压转换特性，并将上述充电电流量转换成电压量，并且转换的电压量 进一步A / D转换为数字值，并且过电流充电 基于数字值分别检测出计时和充电完成条件。