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    • 4. 发明授权
    • Method and system for power conservation in memory devices
    • 存储器件节电的方法和系统
    • US06731564B1
    • 2004-05-04
    • US10391006
    • 2003-03-18
    • Tam M. TranGeorge B. JamisonBryan D. SheffieldDavid J. ToopsVikas K. Agrawal
    • Tam M. TranGeorge B. JamisonBryan D. SheffieldDavid J. ToopsVikas K. Agrawal
    • G11C700
    • G11C7/12G11C2207/002G11C2207/005G11C2207/2227
    • According to one embodiment of the invention, a memory circuit operable to assume a standby mode is provided. A memory circuit includes a transistor comprising a gate and a bulk. The bulk is at a retention voltage level. The memory circuit also includes a first node and a second node that are coupled to each other by the transistor. The first node is operable to assume a higher voltage level than the second node in response to an initiation of the standby mode. The memory circuit also includes a third node coupled to the gate of the transistor. The third node is operable to assume a voltage approximately equal to the retention voltage in response to an initiation of the standby mode. The transistor is operable to reduce any direct current flow between the first node and the second node in response to a rise in voltage at the third node to a voltage approximately equal to the retention voltage.
    • 根据本发明的一个实施例,提供了可操作以呈现待机模式的存储器电路。 存储电路包括一个包括一个门和一个体的晶体管。 体积处于保持电压水平。 存储器电路还包括由晶体管彼此耦合的第一节点和第二节点。 响应于待机模式的启动,第一节点可操作以承担比第二节点更高的电压电平。 存储器电路还包括耦合到晶体管的栅极的第三节点。 第三节点可操作以响应于待机模式的启动而呈现大致等于保持电压的电压。 晶体管可操作以响应于第三节点处的电压升高到大约等于保持电压的电压而减小第一节点和第二节点之间的任何直流电流。
    • 5. 发明授权
    • Method and apparatus for optimal write restore for memory
    • 用于存储器最佳写入还原的方法和装置
    • US07145822B2
    • 2006-12-05
    • US11071012
    • 2005-03-03
    • David J. Toops
    • David J. Toops
    • G11C7/00
    • G11C7/12
    • According to one embodiment of the present invention a memory subsystem comprises a column and a column select signal line. The column comprises at least one bit line and a write precharge circuit. The write precharge circuit is operable to provide at least a portion of a charge on the at least one bit line. The column select signal line is operable to provide a column select signal selecting the column for a write operation. The write precharge circuit is gated with the column select signal line such that the column select signal is communicated to the write precharge circuit upon selection of the column for the write operation. The write precharge circuit is operable to at least partially restore the charge on the at least one bit line upon receipt of the column select signal after the write operation.
    • 根据本发明的一个实施例,存储器子系统包括列和列选择信号线。 该列包括至少一个位线和写入预充电电路。 写入预充电电路可操作以在至少一个位线上提供电荷的至少一部分。 列选择信号线可操作以提供选择用于写操作的列的列选择信号。 写入预充电电路与列选择信号线选通,以便在选择用于写入操作的列时将列选择信号传送到写预充电电路。 写入预充电电路可操作以在写入操作之后接收到列选择信号时至少部分恢复至少一个位线上的电荷。
    • 6. 发明授权
    • Write recovery time minimization for Bi-CMOS SRAM
    • 为Bi-CMOS SRAM写入恢复时间最小化
    • US5508964A
    • 1996-04-16
    • US1996
    • 1993-01-08
    • David J. Toops
    • David J. Toops
    • G11C11/413G11C11/419G11C7/00
    • G11C11/413G11C11/419
    • A circuit and method for minimizing write recovery time in a Bi-CMOS SRAM by equalizing the bit-line voltages during a read access. A P-channel device whose drain, source and gate are connected to bit, bit-bar, and the write control signal, respectively, indirectly equalizes the bit-lines by equalizing the base voltages of the NPN bit-line load devices only when the column is selected for read access. This technique takes advantage of the current gain of the NPN transistor from the base to the emitter to provide fast bit-line equalization immediately following writes, thus minimizing the write recovery time.
    • 一种通过在读取访问期间均衡位线电压来最小化Bi-CMOS SRAM中的写恢复时间的电路和方法。 其漏极,源极和栅极分别连接到位,位线和写入控制信号的P沟道器件通过均衡NPN位线负载器件的基极电压来间接地均衡位线,只有当 列被选择用于读访问。 这种技术利用了从基极到发射极的NPN晶体管的电流增益,在写入之后立即提供快速的位线均衡,从而最小化写恢复时间。