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    • 4. 发明授权
    • Method and apparatus for providing fault detection to a bus within a
computer system
    • 用于向计算机系统内的总线提供故障检测的方法和装置
    • US5784393A
    • 1998-07-21
    • US396680
    • 1995-03-01
    • Larry L. ByersGary R. RobeckRonald W. Splett
    • Larry L. ByersGary R. RobeckRonald W. Splett
    • G06F11/10
    • G06F11/10
    • A method and apparatus for providing fault detection to a corresponding bus when one or more of the users connected to the bus does not have a fault detection capability provided therein. Further, the present invention may provide a method and apparatus for performing fault detection on a corresponding bus when the width of the bus is insufficient to accommodate a number of parity bits. In an exemplary embodiment, a selected one of the number of users may validate all bus transmissions via a number of transceivers, regardless of which user has a fault detection capability provided therein. In another exemplary embodiment of the present invention, a transmitting user may provide a data word and a number of corresponding parity bits. The transmitting user may provide the data word to the bus while storing the corresponding number of parity bits therein. The data word may be provided back to the transmitting user via the corresponding transceivers wherein the transmitting user may check the data word against the number of parity bits previously generated by the transmitting user.
    • 当连接到总线的一个或多个用户不具有其中提供的故障检测能力时,向相应总线提供故障检测的方法和装置。 此外,本发明可以提供一种用于当总线的宽度不足以容纳多个奇偶校验位时在相应总线上执行故障检测的方法和装置。 在示例性实施例中,所选择的一个用户可以经由多个收发器验证所有总线传输,而不管哪个用户具有其中提供的故障检测能力。 在本发明的另一示例性实施例中,发送用户可以提供数据字和多个对应的奇偶校验位。 发送用户可以在存储相应数量的奇偶校验位的同时向总线提供数据字。 数据字可以经由相应的收发器提供给发送用户,其中发送用户可以根据发送用户先前生成的奇偶校验位的数量来检查数据字。
    • 6. 发明授权
    • Fault tolerant clock distribution system
    • 容错时钟分配系统
    • US5422915A
    • 1995-06-06
    • US172661
    • 1993-12-23
    • Larry L. ByersThomas T. KubistaGregory B. Wiedenman
    • Larry L. ByersThomas T. KubistaGregory B. Wiedenman
    • G06F1/12G06F11/16H02J9/06H04J3/06H04L7/04H04L7/00
    • G06F11/1604G06F1/12H02J9/06G06F11/20H04J3/0688Y10T307/62
    • A fault tolerant multiple phase clock distribution system for providing synchronized clock signals to multiple circuit loads. Multiple electrically isolated power domains are powered by redundant AC and DC power sourcing circuits to ensure continued operation upon partial failure of the AC or DC power sourcing circuits. Multiple oscillators from the multiple power domains are synchronized to produce a group of simultaneously synchronized clock signals. Multiple synchronized clock signals from this group are then selected by selection circuitry and selection control circuitry, and are distributed to multiple circuit loads requiring simultaneous synchronization. The oscillator circuitry, synchronization circuitry, selection circuitry, and distribution circuitry is all provided in redundant form, so that the partial failure of any of the circuitry will not result in a system stop. Error recovery circuitry monitors for proper synchronization of the synchronized clock signals, and provides for automatic or manual error recovery upon detection of a synchronization error. A single phase synchronized clock signal is generated to minimize synchronization complexities, and circuitry exists at the circuit loads to generate multiple phase enable signals to emulate a multiple phase clock.
    • 一种用于向多个电路负载提供同步时钟信号的容错多相时钟分配系统。 多个电隔离的电源域由冗余的交流和直流电源电路供电,以确保在交流或直流电源电路部分故障时持续运行。 来自多个电源域的多个振荡器被同步以产生一组同时同步的时钟信号。 然后由选择电路和选择控制电路选择来自该组的多个同步时钟信号,并分配给需要同步同步的多个电路负载。 振荡器电路,同步电路,选择电路和分配电路都以冗余形式提供,使得任何电路的部分故障不会导致系统停止。 错误恢复电路监视同步时钟信号的正确同步,并在检测到同步错误时提供自动或手动错误恢复。 生成单相同步时钟信号以最小化同步复杂度,并且在电路负载处存在电路以产生多相启动信号以仿真多相时钟。