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    • 5. 发明授权
    • Scan testing architectures for power-shutoff aware systems
    • 扫描测试架构,用于断电感知系统
    • US08001433B1
    • 2011-08-16
    • US12345950
    • 2008-12-30
    • Sandeep BhatiaPatrick GallagherBrian FoutzVivek Chickermane
    • Sandeep BhatiaPatrick GallagherBrian FoutzVivek Chickermane
    • G01R31/28G06F17/50
    • G01R31/318575G01R31/318563
    • In a circuit adapted for scan testing, a first set of connections configures the circuit elements into power domains with separate power-level controls, and a second set of connections configures the circuit elements to form scan segments for loading values into circuit elements from input ends of the scan segments and unloading values from circuit elements at output ends of the scan segments. A decompressor circuit receives a decompressor input and is operatively connected to the scan-segment input ends, and a compressor circuit is operatively connected to the scan segment output ends and generates a compressor output. Isolation circuits at scan-segment exits set values for scan segments at scan-segment exits when a corresponding independent power domain is in a power-off state.
    • 在适于扫描测试的电路中,第一组连接将电路元件配置成具有单独的功率电平控制的电源域,并且第二组连接将电路元件配置为形成用于从输入端将值加载到电路元件中的扫描段 的扫描段和从扫描段输出端的电路元件卸载值。 解压缩器电路接收解压缩器输入并且可操作地连接到扫描段输入端,并且压缩机电路可操作地连接到扫描段输出端并产生压缩器输出。 扫描段出口处的隔离电路在相应的独立电源域处于关机状态时,为扫描段出口处的扫描段设置值。
    • 6. 发明授权
    • Test generation for low power circuits
    • 低功耗电路测试一代
    • US07779381B2
    • 2010-08-17
    • US11519381
    • 2006-09-11
    • Vivek ChickermaneJames SagePatrick GallagherXiaochuan Yuan
    • Vivek ChickermaneJames SagePatrick GallagherXiaochuan Yuan
    • G06F17/50
    • G01R31/31721G01R31/31813G06F17/5045
    • In the field of integrated circuit design and testing, especially directed towards integrated circuits intended to operate at low power, a method and system are provided for circuit design and simulation and testing for mapping portions of a circuit, such as a power domain or portion of a power domain, to a test mode. Thereby only those portions of the circuit which need to be powered up in a particular test mode are powered up both in the design (simulation) phase and in the actual testing. This conserves power usage during actual testing as against powering up all portions of the circuit, which is not desirable during the testing of the circuit after manufacture. This ensures that the power conditions required to excite and observe any circuit faults during testing exist for the power conditions that are applied during, for instance, manufacturing testing. By automatically partitioning the faults to remove those that cannot be excited or observed during manufacturing and testing, the testability of the device in terms of its partitions or parts will accurately reflect the power state of the logic portions of the circuit.
    • 在集成电路设计和测试领域,特别针对旨在以低功率运行的集成电路,提供了一种方法和系统,用于电路设计和仿真和测试,用于映射电路的部分,例如电源域或部分 电源域,进入测试模式。 因此,在设计(仿真)阶段和实际测试中只需要在特定测试模式下需要上电的电路的那些部分。 这节省了实际测试期间的功率使用,以防止电路的所有部分上电,这在制造后的电路测试期间是不期望的。 这确保了在测试过程中激发和观察任何电路故障所需的电源条件存在于例如制造测试期间应用的功率条件。 通过自动划分故障以去除在制造和测试期间不能激发或观察到的故障,器件在其分区或部件方面的可测试性将准确反映电路逻辑部分的功率状态。
    • 9. 发明授权
    • Design-For-testability planner
    • 设计可测性规划师
    • US07926012B1
    • 2011-04-12
    • US11951571
    • 2007-12-06
    • Nitin ParimiPatrick GallagherBrian FoutzVivek Chickermane
    • Nitin ParimiPatrick GallagherBrian FoutzVivek Chickermane
    • G06F9/455G06F17/50
    • G06F17/505G06F2217/14
    • A method is provided to improve the usability of Design-For-Testability Synthesis (DFTS) tools and to increase the design process productivity. The method comprises receiving a list of testability and design impact analysis functions, to be performed on the circuit, also referred to as a device under test (DUT). The impact analysis leads to the creation of logical transformations, which can be selected by a user with one or more available transformation methods from a list including, but not limited to, boundary scan test logic insertion, scan test logic insertion, memory BIST (built-in-self-test) logic insertion, and logic BIST logic insertion, and scan test data compression insertion logic insertion.
    • 提供了一种提高设计可测性综合(DFTS)工具的可用性并提高设计流程生产率的方法。 该方法包括接收在电路上执行的可测试性和设计影响分析功能的列表,也被称为被测设备(DUT)。 影响分析导致逻辑变换的创建,其可以由用户从列表中选择一个或多个可用的转换方法,包括但不限于边界扫描测试逻辑插入,扫描测试逻辑插入,存储器BIST(内置 -in-self-test)逻辑插入和逻辑BIST逻辑插入,以及扫描测试数据压缩插入逻辑插入。