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    • 1. 发明公开
    • SEMICONDUCTOR MEMORY
    • HALBLEITERSPEICHER
    • EP1282133A4
    • 2007-12-19
    • EP01912146
    • 2001-03-07
    • NEC ELECTRONICS CORP
    • TAKAHASHI HIROYUKIINABA HIDEOSONODA MASATOSHIKATO YOSHIYUKINAKAGAWA ATSUSHI
    • G11C11/403G11C11/401G11C11/406G11C11/407G11C11/408G11C29/04G11C11/40
    • G11C11/406G11C11/4087
    • A semiconductor memory the cycle time of which is shortened by accelerating the address access. A first address decoder (2) and a first refresh address decoder (5) decode an external address (Xn) fed from outside of the semiconductor memory and a refresh address (RXn) used for refresh in the semiconductor memory, respectively. A multiplexer (8) selects either a decode signal (XnDm) on the external address side or a decode signal (XnRm) on the refresh address side according to an external address transmission signal (EXTR) and a refresh address transmission signal (RFTR) so that a refresh and a Read/Write may be continuously performed in one memory cycle, and outputs the selected one as a decode signal (XnMm). A word driver (10) decodes the decode signals (XnMm, XpMq) selected by the multiplexer (8) and so forth so as to activate a word line (WLmq).
    • 通过加速地址访问来缩短其周期时间的半导体存储器。 第一地址解码器(2)和第一刷新地址解码器(5)分别解码从半导体存储器外部馈送的外部地址(Xn)和半导体存储器中用于刷新的刷新地址(RXn)。 多路复用器(8)根据外部地址发送信号(EXTR)和刷新地址发送信号(RFTR),选择外部地址侧的解码信号(XnDm)或刷新地址侧的解码信号(XnRm) 可以在一个存储周期内连续执行刷新和读/写,并且将所选择的一个作为解码信号(XnMm)输出。 字驱动器(10)对由复用器(8)等选择的解码信号(XnMm,XpMq)进行解码以激活字线(WLmq)。
    • 7. 发明公开
    • SEMICONDUCTOR MEMORY DEVICE AND REFRESH CONTROL CIRCUIT
    • HALBLEITERSPEICHERBAUSTEIN UND AUFFRISCHSTEUERSCHALTUNG
    • EP1351250A4
    • 2005-12-21
    • EP01270215
    • 2001-12-06
    • NEC ELECTRONICS CORP
    • TAKAHASHI HIROYUKIKUSAKARI TAKASHI
    • G11C11/403G11C11/406
    • G11C11/40615G11C11/406G11C2211/4067
    • There are solved problems that a normal access is influenced by refresh and that the refresh cannot be done by continuous write. A semiconductor memory device in which a clock signal used as a reference of the time interval of a refresh of the addresses of one row is generated as a refresh clock signal, a change in an access address 'Adress', fed from the outside, to a memory cell is detected to generate a detection signal, and a memory cell corresponding to the refresh address is refreshed by using the detection signal as a trigger to make an access to the memory cell designated by the access address. A write enable signal (/WE) is used, when inputted, as a trigger to effect refresh and the write. Refresh triggered by an access address change detection signal is suspended for a predetermined period based on the refresh clock signal.
    • 防止刷新对正常访问产生影响并且写操作的继续禁止刷新的问题。 在半导体存储器件中,产生基于对应于单行的地址的刷新操作的时间间隔的时钟信号作为刷新时钟信号。 检测从外部提供并对应于存储器单元的访问地址“地址”的转换,从而通过在访问存储器之前触发该检测信号的产生来对与刷新地址相对应的存储单元执行刷新操作 进行由访问地址指定的单元,其中在写使能信号/ WE的输入时,在执行写入操作之前触发该信号来执行刷新,并且通过触发生成访问地址的刷新操作被中断 基于刷新时钟信号的预定时间段。