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    • 71. 发明授权
    • Semiconductor memory device
    • 半导体存储器件
    • US6002621A
    • 1999-12-14
    • US33657
    • 1998-03-03
    • Shinji TanakaKoji TanakaMikio AsakuraKenichi Yasuda
    • Shinji TanakaKoji TanakaMikio AsakuraKenichi Yasuda
    • G11C29/24G11C7/00
    • G11C29/24
    • Normal column selection signal switching device (20) is provided to switch a signal outputted from normal column selection signal generating device (19) in response to a test-mode signal (TMC1). Even if the normal column selection signal generating device (19) outputs a signal to disable a normal column decoder (3), the normal column selection signal switching device (20) switches the signal to enable the normal column decoder (3) to operate in the test operation. Having this configuration, a semiconductor memory device enables writing of data into all the normal memory cells even after some of the normal memory cells are replaced by spare memory cells.
    • 提供正常列选择信号切换装置(20)以响应于测试模式信号(TMC1)切换从正常列选择信号发生装置(19)输出的信号。 即使正常列选择信号生成装置(19)输出禁止通常的列解码器(3)的信号,通常的列选择信号切换装置(20)切换信号,使通常的列解码器(3)能够工作 测试操作。 具有这种配置,半导体存储器件即使在由备用存储器单元代替一些正常存储器单元之后,也能够将数据写入所有正常存储单元。
    • 73. 发明授权
    • Secondary battery protection device from overcharge/overdischarge
    • 二次电池保护装置过充电/过放电
    • US5896025A
    • 1999-04-20
    • US777965
    • 1996-12-24
    • Takeshi YamaguchiYosifumi SakaguchiShinji TanakaTakehisa YokohamaKouichi HorisakiEiji Matsumasa
    • Takeshi YamaguchiYosifumi SakaguchiShinji TanakaTakehisa YokohamaKouichi HorisakiEiji Matsumasa
    • H01M10/44H02H7/18H02J7/00H02J7/10
    • H02J7/0031
    • A protection circuit device for protecting a secondary battery from an overcharge and/or an overdischarge has first and second terminals, across which a charger and a load are alternatively connectable. A first switch and/or a second switch may be provided in series with the secondary battery between the first and second terminals. In a charging operation mode, the second switch is kept conductive. A charging operation is performed with the first switch made conductive. When the battery is overcharged for some reasons, the first switch is turned off. Upon connection of a load across the first and second terminals, the first switch is restored to a conductive state for a discharging operation which releases the battery from an overdischarge state. In a discharging operation mode, the first switch is kept conductive. A discharge operation is performed with the second switch made conductive. When the battery is overdischarged, the second switch is caused to remain conductive even after commencement of the overdischarge, so that the battery can continue the discharge operation if the temporary overdischarge does not last longer than the predetermined period of time.
    • 用于保护二次电池免受过充电和/或过放电的保护电路装置具有第一和第二端子,充电器和负载可交替地连接在该端子上。 可以在第一和第二端子之间与二次电池串联地提供第一开关和/或第二开关。 在充电操作模式中,第二开关保持导通。 在第一开关导通的情况下执行充电操作。 当电池由于某些原因过充电时,第一个开关关闭。 当跨越第一和第二端子的负载连接时,第一开关被恢复到用于使电池从过放电状态释放的放电操作的导通状态。 在放电操作模式中,第一开关保持导通。 在第二开关导通时执行放电操作。 当电池过度放电时,即使在过放电开始之后,第二开关也保持导通,使得如果临时过放电持续时间比预定时间长,电池可以继续放电操作。