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    • 4. 发明授权
    • Memory device with error correction capability and preemptive partial word write operation
    • 具有纠错能力和抢先部分字写操作的存储器件
    • US07930615B2
    • 2011-04-19
    • US11756011
    • 2007-05-31
    • Ross A. KohlerRichard J. McPartlandWayne E. Werner
    • Ross A. KohlerRichard J. McPartlandWayne E. Werner
    • G11C29/00
    • G11C7/1006G06F11/1044G11C2029/0411
    • A memory device comprises a memory array and error correction circuitry coupled to the memory array. The memory device is configured to perform a partial word write operation in which an error correction code encode process for the given retrieved word is initiated prior to completion of an error correction code decode process for the given retrieved word based on an assumption that the error correction code decode process will not indicate an error in the given retrieved word. If the error correction code decode process when completed indicates an error in the given retrieved word, the error in the given retrieved word is corrected in the error correction circuitry, and the error correction code encode process is restarted using the corrected word. The error correction code decode process and an associated correct process are thereby removed from a critical timing path of the partial word write operation.
    • 存储器件包括耦合到存储器阵列的存储器阵列和纠错电路。 存储器装置被配置为执行部分字写入操作,其中在完成针对给定检索字的纠错码解码处理之前,针对给定检索到的字的纠错码编码处理是基于错误校正 代码解码过程不会在给定的检索词中指示错误。 如果完成时的纠错码解码处理指示给定检索字中的错误,则在纠错电路中校正给定检索字中的错误,并使用校正字重新开始纠错码编码处理。 因此,从部分字写入操作的临界定时路径移除纠错码解码处理和相关联的正确处理。
    • 6. 发明授权
    • Secure random number generator
    • 安全随机数发生器
    • US08566377B2
    • 2013-10-22
    • US12934510
    • 2008-05-23
    • Edward B. HarrisRichard HoggRoss A. KohlerRichard J. McPartlandWayne E. Werner
    • Edward B. HarrisRichard HoggRoss A. KohlerRichard J. McPartlandWayne E. Werner
    • G06F7/58
    • G06F7/588G06F11/1008G11C11/412G11C2029/0411
    • A random number generator circuit includes a first memory having multiple storage elements. Each of the storage elements has an initial state corresponding thereto when powered up by a voltage supply source applied to the first memory. The first memory is operative to generate a first signal including multiple bits indicative of the respective initial states of the storage elements. The random number generator circuit further includes an error correction circuit coupled to the first memory. The error correction circuit is operative to receive the first signal and to correct at least one bit in the first signal that is not repeatable upon successive applications of power to the first memory to thereby generate a second signal. The second signal is a random number that is repeatable upon successive applications of power to the first memory.
    • 随机数发生器电路包括具有多个存储元件的第一存储器。 当由施加到第一存储器的电压源供电时,每个存储元件具有与之对应的初始状态。 第一存储器用于产生包括指示存储元件的相应初始状态的多个位的第一信号。 随机数发生器电路还包括耦合到第一存储器的纠错电路。 误差校正电路可操作以接收第一信号并且校正第一信号中的至少一个位,其在连续施加电力到第一存储器从而产生第二信号时不重复。 第二信号是在连续向第一存储器施加电力时可重复的随机数。
    • 7. 发明授权
    • Method and apparatus for testing a memory device
    • 用于测试存储器件的方法和装置
    • US08023348B2
    • 2011-09-20
    • US12443776
    • 2007-10-29
    • Ross A. KohlerRichard J. McPartlandWayne E. Werner
    • Ross A. KohlerRichard J. McPartlandWayne E. Werner
    • G11C29/00
    • G11C8/08G11C11/401G11C29/02G11C29/028G11C29/50G11C29/50016G11C2029/1202
    • Techniques for testing a semiconductor memory device are provided. The memory device includes a plurality of memory cells and a plurality of row lines and column lines connected to the memory cells for selectively accessing one or more of the memory cells. The method includes the steps of: applying a first voltage to at least a given one of the row lines corresponding to at least a given one of the memory cells to be tested, the first voltage being selected to stress at least one performance characteristic of the memory device, the first voltage being different than a second voltage applied to the given one of the row lines for accessing at least one of the memory cells during normal operation of the memory device; exercising the memory device in accordance with prescribed testing parameters; and identifying whether the memory device is operable within prescribed margins of the testing parameters.
    • 提供了用于测试半导体存储器件的技术。 存储器件包括多个存储器单元和连接到存储器单元的多个行线和列线,用于选择性地访问一个或多个存储器单元。 该方法包括以下步骤:将至少一个对应于待测试的存储器单元中的给定一个行的行中的至少一个施加第一电压,选择第一电压以强调第一电压的至少一个性能特征 存储器件,所述第一电压不同于施加到所述给定行之一行的第二电压,用于在所述存储器件的正常操作期间访问所述存储器单元中的至少一个; 根据规定的测试参数锻炼记忆装置; 以及识别存储器件是否在测试参数的规定余量内可操作。
    • 9. 发明申请
    • Multiple-Level Memory with Analog Read
    • 具有模拟读取功能的多级存储器
    • US20090196098A1
    • 2009-08-06
    • US12023092
    • 2008-01-31
    • Ross A. KohlerRichard J. McPartlandWayne E. Werner
    • Ross A. KohlerRichard J. McPartlandWayne E. Werner
    • G11C16/04G11C16/06G11C7/00
    • G11C27/005G11C7/06G11C11/5642G11C29/00
    • A memory circuit includes a plurality of memory cells, each of the memory cells being operative to store multiple bits of data therein, and a plurality of column lines and row lines coupled to the memory cells for selectively accessing the memory cells. The circuit further includes multiple sense amplifiers, each of the sense amplifiers being connected to a corresponding one of the column lines and being operative to detect an electric charge stored in a selected one of the memory cells coupled to the corresponding column line and to generate an analog signal indicative of the stored electric charge. An analog multiplexer is connected to the sense amplifiers. The analog multiplexer is operative to receive the respective analog signals from the sense amplifiers and to generate an analog output signal having a magnitude which varies in time as a function of the respective analog signals from the sense amplifiers.
    • 存储器电路包括多个存储器单元,每个存储单元可操作以在其中存储多个数据位,并且多个列线和行线耦合到存储器单元以选择性地访问存储器单元。 该电路还包括多个读出放大器,每个读出放大器连接到相应的列线之一,并且可操作以检测存储在耦合到对应的列线的存储器单元中选定的一个中的电荷,并产生 指示所存储的电荷的模拟信号。 模拟多路复用器连接到读出放大器。 模拟多路复用器可操作以从读出放大器接收相应的模拟信号,并产生具有随时间变化的幅度的模拟输出信号,作为来自读出放大器的相应模拟信号的函数。
    • 10. 发明申请
    • Method and Apparatus for Idle Cycle Refresh Request in Dram
    • 用于空闲周期刷新请求的方法和装置
    • US20090141575A1
    • 2009-06-04
    • US11948214
    • 2007-11-30
    • Ross A. KohlerRichard J. McPartlandWayne E. Werner
    • Ross A. KohlerRichard J. McPartlandWayne E. Werner
    • G11C7/00
    • G11C11/406G11C2211/4061G11C2211/4065
    • Generally, methods and apparatus are provided for idle cycle refresh request in a dynamic random access memory. According to one aspect of the invention, a dynamic random access memory is refreshed by determining if a refresh of the dynamic random access memory is required; and allocating an idle cycle sequence to refresh at least a portion of the dynamic random access memory only if the determining step determines that a refresh of the dynamic random access memory is required. A refresh flag can optionally be set if a refresh is required. The idle cycle sequence comprises one or more idle cycles. The idle cycle sequence can optionally be allocated within a predefined duration of the refresh flag being set. The step of determining step whether a refresh of the dynamic random access memory is required can be based on real-time or expected conditions.
    • 通常,为动态随机存取存储器中的空闲周期刷新请求提供方法和装置。 根据本发明的一个方面,通过确定是否需要刷新动态随机存取存储器来刷新动态随机存取存储器; 以及仅当确定步骤确定需要动态随机存取存储器的刷新时,才分配空闲周期序列来刷新动态随机存取存储器的至少一部分。 如果需要刷新,可以选择设置刷新标志。 空闲周期序列包括一个或多个空闲周期。 空闲周期序列可以可选地在被设置的刷新标志的预定持续时间内被分配。 确定步骤是否需要刷新动态随机存取存储器的步骤可以基于实时或预期的条件。