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    • 162. 发明授权
    • Systems and methods for preventing malfunction of content addressable memory resulting from concurrent write and lookup operations
    • 用于防止由并发写入和查找操作导致的内容可寻址内存故障的系统和方法
    • US07085147B2
    • 2006-08-01
    • US11003084
    • 2004-12-03
    • Hiroaki MurakamiHiromi NoroOsamu Takahashi
    • Hiroaki MurakamiHiromi NoroOsamu Takahashi
    • G11C15/00
    • G11C15/00
    • Systems and methods for preventing the corruption of a CAM lookup result when a lookup in the CAM and a write to the CAM are concurrently executed. In one embodiment, a tag value is clocked into a tag latch simultaneously with a data value being clocked into a data latch. The tag value and initial CAM element values begin propagating through comparison logic. After a delay, the data value is written from the data latch to a CAM element. After the tag value and initial CAM values propagate through the comparison logic to produce comparison outputs, but before the newly written data value propagates through the comparison logic and changes the comparison outputs, the comparison outputs are latched. The comparison outputs can then be processed as if the data values in the CAM elements had not been changed by the write operation.
    • 当CAM中的查找和对CAM的写入被同时执行时,用于防止CAM查找的损坏的系统和方法。 在一个实施例中,将标签值与被计入数据锁存器的数据值同时定时到标签锁存器中。 标签值和初始CAM元素值通过比较逻辑开始传播。 在延迟之后,将数据值从数据锁存器写入CAM元件。 在标签值和初始CAM值通过比较逻辑传播以产生比较输出之后,但在新写入的数据值通过比较逻辑传播并更改比较输出之前,比较输出被锁存。 然后可以像比较输出那样处理,因为CAM元素中的数据值没有被写入操作改变。
    • 165. 发明申请
    • System and method for reducing power consumption associated with the capacitance of inactive portions of a multiplexer
    • 用于降低与多路复用器的非活动部分的电容相关联的功耗的系统和方法
    • US20060152247A1
    • 2006-07-13
    • US11033612
    • 2005-01-12
    • Hiroaki MurakamiOsamu TakahashiShoji Onishi
    • Hiroaki MurakamiOsamu TakahashiShoji Onishi
    • H03K19/173
    • H03K19/1737
    • Systems and methods for reducing the power consumption associated with the capacitance of sections of a multiplexer are disclosed. At each cycle, a timing signal is selectively sent only to sections of the multiplexer that include active logic. A plurality of control signals is received for processing by a corresponding plurality of input selection circuits. A plurality of additional inputs corresponding to the plurality of input selection circuits may also be received. In one embodiment, each input selection circuit is configured to output a corresponding input signal if a corresponding control signal is asserted and a timing signal is made available to the input selection circuit. To avoid unnecessary power consumption associated with the capacitance of various portions of the multiplexer, the timing signal is only asserted to a portion of the multiplexer at any given clock cycle according to the values of the control signals.
    • 公开了用于降低与多路复用器的部分的电容相关联的功耗的系统和方法。 在每个周期,定时信号仅选择性地仅发送到包括有效逻辑的多路复用器的部分。 多个控制信号被接收用于由相应的多个输入选择电路进行处理。 还可以接收对应于多个输入选择电路的多个附加输入。 在一个实施例中,每个输入选择电路被配置为如果相应的控制信号被断言并且使定时信号对输入选择电路可用,则输出相应的输入信号。 为了避免与多路复用器的各个部分的电容相关联的不必要的功率消耗,定时信号仅根据控制信号的值以任何给定的时钟周期被认定到多路复用器的一部分。
    • 166. 发明授权
    • SOI sense amplifier with cross-coupled body terminal
    • 具有交叉耦合体端子的SOI读出放大器
    • US07053668B2
    • 2006-05-30
    • US10852863
    • 2004-05-25
    • Takaaki NakazatoToru AsanoOsamu TakahashiSang Dhong
    • Takaaki NakazatoToru AsanoOsamu TakahashiSang Dhong
    • G01R19/00G11C7/00H03F3/45
    • H03K3/012G11C7/065H03K3/356139
    • Systems and methods for increasing the amount of current that can flow through the data line pull-down transistors in a sense amplifier by tying the bodies of these transistors to a voltage other than ground. In one embodiment, the bodies of the data line pull-down transistors in a sense amplifier are tied to the intermediate nodes on the opposing side of the sense amplifier to increase the current flow through the data line pull-down transistors, and also to reduce the voltage at the intermediate node that will be pulled low by the action of the bit line transistors. In one embodiment, the sense amplifier also includes pre-charge circuits which pre-charge the intermediate nodes to a predetermined voltage that is not reduced by the threshold voltage of the pull-down transistors.
    • 用于通过将这些晶体管的主体连接到除地之外的电压来增加可以流过读出放大器中的数据线下拉晶体管的电流量的系统和方法。 在一个实施例中,读出放大器中的数据线下拉晶体管的主体被连接到读出放大器的相对侧上的中间节点,以增加通过数据线下拉晶体管的电流,并且还减少 通过位线晶体管的动作将中间节点处的电压拉低。 在一个实施例中,读出放大器还包括将中间节点预充电到未被下拉晶体管的阈值电压降低的预定电压的预充电电路。
    • 167. 发明授权
    • Systems and methods for operating logic circuits
    • 用于操作逻辑电路的系统和方法
    • US07030658B2
    • 2006-04-18
    • US10764179
    • 2004-01-23
    • Hiroaki MurakamiOsamu TakahashiJieming Qi
    • Hiroaki MurakamiOsamu TakahashiJieming Qi
    • H03K19/20
    • H03K19/1737H03K19/0016
    • Systems and methods for reducing the power consumption of some combinations of logic gates by reducing the number of unnecessary transitions that are made by logic gates that do not affect the output of the logic. In one embodiment, a modified exclusive-OR (XOR) gate is coupled to a modified multiplexer. The XOR gate has two inputs, Ain and Bin, and an output, XORout, which is provided as an input to the multiplexer. Another input to the multiplexer is Cin. A select signal is input to the multiplexer to select either Cin or XORout to be provided at the output of the multiplexer. If XORout is selected, the XOR gate operates in a first mode in which it functions as a normal XOR gate. If Cin is selected, the XOR gate operates in a second mode in which the XOR gate uses less power than when the XOR gate operates normally.
    • 通过减少不影响逻辑输出的逻辑门进行的不必要的转换次数来减少逻辑门的某些组合的功耗的系统和方法。 在一个实施例中,修改的异或(XOR)门耦合到修改的多路复用器。 XOR门具有两个输入,即中的和B 中的A 和作为多路复用器的输入提供的输出XOR < 。 复用器的另一个输入是中的C 。 选择信号被输入到多路复用器以选择要在多路复用器的输出处提供的或XOR 输出中的C 。 如果选择XOR ,则异或门以第一模式工作,其中它用作正常的异或门。 如果选择了中的C ,则异或门以第二模式工作,其中XOR门比XOR门正常工作时使用的功率更小。
    • 169. 发明申请
    • SOI sense amplifier with pre-charge
    • 具有预充电的SOI读出放大器
    • US20050264322A1
    • 2005-12-01
    • US10852868
    • 2004-05-25
    • Takaaki NakazatoToru AsanoOsamu TakahashiSang Dhong
    • Takaaki NakazatoToru AsanoOsamu TakahashiSang Dhong
    • G11C11/419G11C7/06G11C7/12H03F3/45H03K3/356H03K19/0948
    • G11C7/065G11C7/12H03F3/45183H03F2203/45318
    • Systems and methods for pre-charging opposing nodes in a sense amplifier to substantially the same voltage in order to reduce or eliminate malfunctions arising from differences in threshold voltages of transistors coupled to the opposing nodes. One embodiment is a method including providing a silicon-on-insulator (SOI) sense amplifier having intermediate nodes between the transistors coupling each output data line to the corresponding input bit line and pre-charging each intermediate node to a predetermined voltage while the sense amplifier is not enabled. In one embodiment, the intermediate nodes are pre-charged by coupling them to a voltage source through pre-charge paths that do not include the data line pull-down transistors. In one embodiment, the method also includes decoupling the pre-charge paths after pre-charging the intermediate nodes and then enabling the sense amplifier.
    • 用于将读出放大器中的相对节点预充电到基本相同的电压的系统和方法,以便减少或消除由耦合到相对节点的晶体管的阈值电压的差异引起的故障。 一个实施例是一种方法,包括提供绝缘体上硅(SOI)读出放大器,该晶体管在晶体管之间具有中间节点,每个晶体管将每个输出数据线耦合到相应的输入位线,并将每个中间节点预充电到预定电压,而读出放大器 未启用 在一个实施例中,中间节点通过不包括数据线下拉晶体管的预充电路径将其耦合到电压源进行预充电。 在一个实施例中,该方法还包括在对中间节点预充电然后启用读出放大器之后去耦合预充电路径。