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    • 4. 发明授权
    • Content addressable memory combining match comparisons of a plurality of
cells
    • 内容可寻址存储器组合多个单元的比较比较
    • US5130945A
    • 1992-07-14
    • US551268
    • 1990-07-12
    • Takeshi HamamotoToshifumi KobayashiMasaaki Mihara
    • Takeshi HamamotoToshifumi KobayashiMasaaki Mihara
    • G11C15/00G11C15/04
    • G11C15/04G11C15/043
    • Each match line is connected to a plurality of CAM cells constituting a CAM array. The respective CAM cells store data applied through a bit line and an inverted-bit line in its data storage portion when selected by a word line. The stored data are applied to a data comparison portion to be compared with retrieval data applied through the bit line and the inverted-bit line, thereby detecting match or mismatch therebetween. A comparison result of the data comparison portion is first stored in a capacitance element in the form of charge. In order to prevent escape of the information stored in the capacitance element, a blocking means blocks a part of a charge and discharge path for the capacitance element. A charge transfer means provided between the capacitance element and the match line transfers a certain amount of charge from either one to the other when information of mismatch is stored in the capacitance element. This causes fluctuation of charge potential on the match line. The fluctuation of potential on the match line depends on the number of mismatched CAM cells out of a plurality of CAM cells connected to the match line. Therefore, detection of potential on the match line permits detecting the number of mismatched CAM cells.
    • 每个匹配线连接到构成CAM阵列的多个CAM单元。 当通过字线选择时,相应的CAM单元存储在其数据存储部分中通过位线和反相位线施加的数据。 将存储的数据应用于数据比较部分,以与通过位线和反向位线施加的检索数据进行比较,从而检测它们之间的匹配或失配。 数据比较部分的比较结果首先以电荷的形式存储在电容元件中。 为了防止存储在电容元件中的信息的逸出,阻塞装置阻挡电容元件的充电和放电路径的一部分。 当在电容元件中存储不匹配的信息时,设置在电容元件和匹配线之间的电荷转移装置将一定量的电荷从两者之一传递到另一个。 这导致匹配线上的电荷电位波动。 匹配线上的电位波动取决于连接到匹配线的多个CAM单元中不匹配的CAM单元的数量。 因此,匹配线上的电位检测允许检测不匹配的CAM单元的数量。
    • 5. 发明授权
    • Arbiter circuit
    • 仲裁电路
    • US4998027A
    • 1991-03-05
    • US491014
    • 1990-03-09
    • Masaaki MiharaToshifumi Kobayashi
    • Masaaki MiharaToshifumi Kobayashi
    • G06F13/362G06F13/364H03K17/00
    • G06F13/364
    • Disclosed is an arbiter circuit for arbitrating a contention between two request signals which simultaneously attain the H (logical high) level indicating a "request". In this arbiter circuit, buffer circuits, having different input logic threshold voltages, are connected to the respective outputs of two three-input NAND gates. The respective outputs of these two buffer circuits, as signals indicating "acknowledgement" or "negative acknowledgement" of the request signals, are derived as final outputs of the arbiter circuit. One of the buffer circuits has an input logic threshold voltage lower than a logic threshold voltage of the two NAND gates, while the other buffer circuit has an input logic threshold voltage set higher than the logic threshold voltage of the NAND gates. Therefore, when the NAND gates output a voltage with the logic level neither the H level nor the L (logical low) level, a signal of the logic level H indicating the "negative acknowledgement" and a signal of the logical level L indicating the "acknowledgement" are reliably outputted from the buffer circuit with the lower input logic threshold voltage and from the other buffer circuit with the higher input logic threshold voltage, respectively. That is, even if two requests occur simultaneously, one of the request signals is rapidly acknowledged.
    • 公开了一种用于仲裁同时达到表示“请求”的H(逻辑高)电平的两个请求信号之间的争用的仲裁电路。 在该仲裁器电路中,具有不同输入逻辑阈值电压的缓冲电路连接到两个三输入NAND门的相应输出。 这两个缓冲电路的各自的输出,作为指示请求信号的“确认”或“否定确认”的信号被导出为仲裁器电路的最终输出。 其中一个缓冲电路具有低于两个NAND门的逻辑阈值电压的输入逻辑阈值电压,而另一个缓冲电路的输入逻辑阈值电压设置为高于NAND门的逻辑门限电压。 因此,当NAND门不产生具有H电平和L(逻辑低)电平的逻辑电平的电压时,指示“否定确认”的逻辑电平H的信号和表示“ 确认“能够从具有较低输入逻辑阈值电压的缓冲电路和具有较高输入逻辑阈值电压的另一缓冲电路可靠地输出。 也就是说,即使两个请求同时发生,一个请求信号被快速确认。
    • 6. 发明授权
    • Arbiter circuit for processing concurrent requests for access to shared
resources
    • 仲裁器电路,用于处理共享资源访问的并发请求
    • US4924220A
    • 1990-05-08
    • US286922
    • 1988-11-18
    • Masaaki MiharaToshifumi Kobayashi
    • Masaaki MiharaToshifumi Kobayashi
    • G06F15/16G06F13/14G06F13/362G06F13/364G06F15/177
    • G06F13/14G06F13/364
    • An arbiter circuit is disclosed for processing competing requests for access to a shared resource made simultaneously by two subsystems in a multi-processor system. The arbiter circuit includes an SR flip-flop composed of a pair of NAND gates, and functions to block the passage of a subsequent request signal from one subsystem to the SR flip-flop during a predetermined time interval after a request signal from the other subsystem has been supplied to the flip-flop. A result is that the both inputs of the SR flip-flop are not shifted up from the low levels to the high levels at the same time by the simultaneous generation of request signals from both subsystems, thereby eliminating any possibility of the output from the flip-flop floating at an intermediate level between the high and low level.
    • 公开了一种仲裁器电路,用于处理在多处理器系统中由两个子系统同时进行的对共享资源的访问的竞争请求。 仲裁器电路包括由一对NAND门组成的SR触发器,并且在来自另一个子系统的请求信号之后的预定时间间隔期间阻止后续请求信号从一个子系统到SR触发器的通过 已被提供给触发器。 结果是,通过同时生成来自两个子系统的请求信号,SR触发器的两个输入都不会从低电平向上移动到高电平,从而消除了从翻转的输出的任何可能性 - 浮动在高低位之间的中间水平。
    • 8. 发明授权
    • Switch device
    • 开关装置
    • US06344622B1
    • 2002-02-05
    • US09626908
    • 2000-07-27
    • Shuji TakiguchiToshifumi KobayashiAtuyoshi Yamaguchi
    • Shuji TakiguchiToshifumi KobayashiAtuyoshi Yamaguchi
    • H01H900
    • H01H13/70H01H2011/0081H01H2221/018H01H2223/002
    • A switch device includes a key member (4). The key member (4) has a display switch button (13) including a transparent portion through which image information displayed on a display screen of an image display device is transmitted so as to display the image information on an outer side surface of the key member (4). Further, the key member (4) has a button mounting frame (16) including a switch depressing portion (14) operative to switch a switch (6) when the key depressing portion (14) is depressed, and having a button mounting hole portion to which the display switch button (13) is attached. Furthermore, the key member (4) has a waterproof dust cover (19) of a rubber material, which is molded integrally on the button mounting frame (16) to cover the same, and which includes a support portion (17) held in intimate contact with the display screen, and a contractible skirt portion (18). A plurality of resin filling holes are formed in the button mounting frame. The rubber material, forming the waterproof dust cover (19), is filled in the resin filling holes.
    • 开关装置包括键构件(4)。 键构件(4)具有显示开关按钮(13),其包括透明部分,通过该透明部分发送显示在图像显示装置的显示屏幕上的图像信息,以便在键部件的外侧表面上显示图像信息 (4)。 此外,键构件(4)具有按钮安装框架(16),该按钮安装框架(16)包括当按压键按压部(14)时可操作地切换开关(6)的开关按压部(14),并且具有按钮安装孔部 显示开关按钮(13)附接到该显示开关按钮。 此外,键构件(4)具有橡胶材料的防水防尘罩(19),其一体地模制在按钮安装框架(16)上以覆盖其上,并且包括保持在亲密的支撑部分(17) 与显示屏幕接触,以及收缩裙部分(18)。 多个树脂填充孔形成在按钮安装框架中。 形成防水防尘罩(19)的橡胶材料填充在树脂填充孔中。
    • 9. 发明授权
    • Arbiter circuit for processing concurrent requests for access to shared
resources
    • 仲裁器电路,用于处理共享资源访问的并发请求
    • US4962379A
    • 1990-10-09
    • US286921
    • 1988-11-18
    • Kenichi YasudaToshifumi KobayashiMichihiro Yamada
    • Kenichi YasudaToshifumi KobayashiMichihiro Yamada
    • G06F15/16G06F9/48G06F13/362G06F13/364G06F15/177H03K3/037H03K17/00
    • G06F13/364
    • An arbiter circuit is disclosed for processing requests made at least two subsystems in a multiprocessor system for access to a resource shared by the subsystems. The arbiter circuit includes an SR flip-flop composed of a pair of NAND gates. The flip-flop is operative in response to a time-staggered request signals from the subsystems to provide a request acknowledging signal to the shared resource. When two request signals are simultaneously supplied to the arbiter circuit, the outputs from the pair of NAND gates tend to stay at an intermediate level between the normal two distincitive logic levels, failing to produce an acknowledgment signal. However, the intermediate level of the NAND gate outputs is sensed by a NOR gate to a trigger a switching device into conduction, by means of which one of the intermediate NAND gate outputs is positively shifted to either of the active logic levels for the generation of an acknowledgement signal to the shared resources. Thus, one of the two subsystems is allowed access to the shared resource.
    • 公开了一种仲裁器电路,用于处理在多处理器系统中至少两个子系统的请求,以访问子系统共享的资源。 仲裁器电路包括由一对NAND门构成的SR触发器。 触发器响应于来自子系统的时间错误的请求信号而工作,以向共享资源提供请求确认信号。 当两个请求信号同时提供给仲裁器电路时,来自该对NAND门的输出趋向于保持在正常的两个不平等逻辑电平之间的中间电平,不能产生确认信号。 然而,NAND门输出的中间电平由或非门触发,触发开关器件进入导通状态,通过其中的一个中间NAND门输出被积极地移动到任何一个有源逻辑电平以产生 向共享资源发送确认信号。 因此,允许两个子系统之一访问共享资源。