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    • 2. 发明授权
    • Electrically erasable and programmable non-volatile memory device with testable redundancy circuits
    • 与可测试冗余电路电可擦除和可编程的非易失性存储器设备
    • EP0806773B1
    • 2003-03-19
    • EP96830267.9
    • 1996-05-09
    • STMicroelectronics S.r.l.
    • Dallabora, MarcoVilla, CorradoDefendi, Marco
    • G11C29/00
    • G11C29/24G11C29/02G11C29/44G11C29/824
    • An electrically erasable and programmable non-volatile memory device comprises at least one memory sector (S1-S8) comprising an array of memory cells (MC) arranged in rows (WL0-WL255) and first-level columns (BL0-BL255), the first-level columns (BL0-BL255) being grouped together in groups of first-level columns each coupled to a respective second-level column (B1-B64), first-level selection means (2) for selectively coupling one first-level column for each group to the respective second-level column, second-level selection means (3,4) for selecting one of the second-level columns, first direct memory access test means (SW6) activatable in a first test mode for directly coupling a selected memory cell (MC) of the array to a respective output terminal (Oi) of the memory device, redundancy columns (RBL0-RBL3) of redundancy memory cells (RMC) for replacing defective columns (BL0-BL255) of memory cells (MC), and a redundancy control circuit (CAM1-CAM4,5-7,12,SW1-SW5,24) comprising defective-address storage means (CAM1-CAM4) for storing addresses of the defective columns (BL0-BL255) and activating respective redundancy columns (RBL0-RBL3) when the defective columns are addressed. The redundancy control circuit comprises second direct memory access test means (24) activatable in a second test mode together with the first direct memory access test means for directly coupling memory elements (AB0-AB7,GB) of the defective-address storage means (CAM1-CAM4) to respective second-level columns (B1-B64) of the array, whereby the memory elements of the defective-address storage means can be directly coupled to output terminals (Oi) of the memory device.
    • 7. 发明公开
    • A redundancy scheme for an integrated memory circuit
    • Redundanzschemafüreinen integrierten Speicherbaustein
    • EP1498906A1
    • 2005-01-19
    • EP03077228.9
    • 2003-07-16
    • STMicroelectronics S.r.l.
    • Martinelli, AndreaBalluchi, DanieleVilla, Corrado
    • G11C29/00
    • G11C29/83
    • A redundancy scheme for a memory integrated circuit having at least two memory sectors (S1-Sn) and, associated with each memory sector, a respective memory location selector (1031-103n) for selecting memory locations within the memory sector according to an address (ADD). The redundancy scheme comprises at least one redundant memory sector (RS1-RSm) adapted to functionally replace one of the at least two memory sectors, and a redundancy control circuitry (111) for causing the functional replacement of a memory sector declared to be unusable by one of the at least one redundant memory sector; the redundancy control circuitry detects an access request to a memory location within the unusable memory sector and diverts the access request to a corresponding redundant memory location in the redundant memory sector. Associated with each memory location selector, respective power supply control means (1131-113n) are provided adapted to selectively connect/disconnect the associated memory location selector to/from a power supply distribution line (VXR). A memory sector unusable status indicator element (211) is associated with each memory sector, for controlling the respective power supply control means so as to cause, when set, the selective disconnection of the respective memory location selector from the power supply distribution line.
    • 一种用于具有至少两个存储器扇区(S1-Sn)并且与每个存储器扇区相关联的存储器集成电路的冗余方案,用于根据地址来选择存储器扇区内的存储器位置的相应存储器位置选择器(1031-103n) 加)。 所述冗余方案包括适于功能地替代所述至少两个存储器扇区中的一个的至少一个冗余存储器扇区(RS1-RSm),以及冗余控制电路(111),用于使被声明为不可用的存储器扇区的功能替换 所述至少一个冗余存储器扇区中的一个; 冗余控制电路检测对不可用存储器扇区内的存储器位置的访问请求,并将访问请求转发到冗余存储器扇区中的相应冗余存储器位置。 与每个存储器位置选择器相关联,提供相应的电源控制装置(1131-113n),其适于选择性地将相关联的存储器位置选择器连接/断开与电源分配线(VXR)的连接/断开。 存储器扇区不可用状态指示器元件(211)与每个存储器扇区相关联,用于控制相应的电源控制装置,以便在设置时引起各个存储器位置选择器与电源分配线的选择性断开。
    • 9. 发明公开
    • Reduction of the time for executing an externally commanded transfer of data in an integrated device
    • 在外部控制的数据传输的执行时间减小的集成器件
    • EP1835618A1
    • 2007-09-19
    • EP06425173.9
    • 2006-03-16
    • STMicroelectronics S.r.l.
    • Vimercati, DanieleSchippers, StefanVilla, CorradoZambelli, Yuri
    • H03K5/15G06F1/10
    • H03K5/15013
    • Cumulative delay contributions introduced by an input buffer and by the metal line that distributes the buffered external control signal to a plurality of synchronizing and/or enabling circuits for performing a transfer of data to and from an integrated device, can be significantly reduced by having the external signal applied on a pad distributed unbuffered through a metal line of sufficiently large size (conductivity) such to introduce a negligible intrinsic propagation delay, though fulfilling the specified maximum admitted input pad capacitance, and by realizing locally dedicated input buffers to each of a plurality of synchronizing and/or enabling circuits of data transfer of the integrated device for applying thereto a buffered replica of the external signal present on said distributing metal line.
    • 通过在INPUTBUFFER和由含金属的引入累积延迟的贡献没有分配缓冲的外部控制信号,以同步和/或使能电路在集成设备执行传输数据的向和从的复数,可以显着地由具有减少的 应用上的焊盘的外部信号通过寻求以引入可忽略的固有传播延迟足够大的尺寸(导电率)的金属线分布缓冲,虽然满足规定的最大承认输入衬垫电容,并且通过实现本地专用输入缓冲器的每一个的多个 的同步和/或使该集成器件的数据传送电路,用于向其施加存在于所述分配含金属的外部信号的缓冲的复制品。