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    • 4. 发明授权
    • Intermediate voltage sensor for CMOS circuits
    • 用于CMOS电路的中压传感器
    • US5631575A
    • 1997-05-20
    • US524848
    • 1995-09-07
    • Kuen-Jong LeeJing-Jou Tang
    • Kuen-Jong LeeJing-Jou Tang
    • G01R19/00H03K19/0948H03K19/00
    • G01R19/0084
    • A built-in intermediate voltage sensor for CMOS circuits comprises a linear inverter, a first voltage control switch, a second voltage control switch, and a buffer. The linear inverter has an input end connected with an input signal under test. The first voltage control switch has a control end and an input end which are connected respectively with the input end and an output end of the linear inverter. The second voltage control switch has a control end and an input end which are connected respectively with the output end and the input end of the linear inverter. The buffer has an input end connected with the output end of the first voltage control switch and the output end of the second voltage control switch. The buffer gives forth an output voltage having a first logic value when the input signal has a voltage value of logic "0" or logic "1". The buffer is further capable of giving forth another output voltage having a second logic value when the input signal has a voltage value intermediate between logic "0" and logic "1".
    • 用于CMOS电路的内置中间电压传感器包括线性反相器,第一电压控制开关,第二电压控制开关和缓冲器。 线性逆变器的输入端与被测输入信号相连。 第一电压控制开关具有分别连接到线性逆变器的输入端和输出端的控制端和输入端。 第二电压控制开关具有分别连接到线性逆变器的输出端和输入端的控制端和输入端。 缓冲器具有与第一电压控制开关的输出端和第二电压控制开关的输出端连接的输入端。 当输入信号具有逻辑“0”或逻辑“1”的电压值时,缓冲器提供具有第一逻辑值的输出电压。 当输入信号具有介于逻辑“0”和逻辑“1”之间的电压值时,缓冲器还能够产生具有第二逻辑值的另一输出电压。
    • 5. 发明授权
    • Built-in current sensor for IDDQ monitoring
    • 内置电流传感器,用于IDDQ监控
    • US5808476A
    • 1998-09-15
    • US688101
    • 1996-07-29
    • Kuen-Jong LeeJing-Jou Tang
    • Kuen-Jong LeeJing-Jou Tang
    • G01R31/30G01R31/26
    • G01R31/3004G01R31/3008
    • An apparatus for measuring the current of a CMOS circuit includes a reference current generator to generate a reference current, a first current mirror to mirror the reference current, a second current mirror to mirror the current consumed by the CMOS circuit, an inverter to compare the above two mirrored currents and generate a signal to indicate which current is larger, and a multiplexer to switch between the normal circuit operation mode and the test mode. By this apparatus, it is possible to measure rapidly and accurately whether the CMOS circuit consumes an abnormally large current, thereby determining whether the CMOS circuit contains defects. This apparatus is based on the current-mode approach, hence can provide a high speed signal processing capability and has lower sensitivity to parameter deviation caused by process or operating temperature variations. It also provides scaleable sensing resolutions and programmable current reference.
    • 用于测量CMOS电路的电流的装置包括:产生参考电流的参考电流发生器,反映参考电流的第一电流镜;反映由CMOS电路消耗的电流的第二电流镜;反相器,用于比较 高于两个镜像电流,并产生一个信号以指示哪个电流较大,以及多路复用器在正常电路操作模式和测试模式之间切换。 通过该装置,可以快速准确地测量CMOS电路是否消耗异常大的电流,从而确定CMOS电路是否包含缺陷。 该装置基于电流模式方式,因此可以提供高速信号处理能力,并且对由过程或工作温度变化引起的参数偏差具有较低的灵敏度。 它还提供可扩展的感测分辨率和可编程电流参考。
    • 6. 发明授权
    • Built-in self test for multiple memories in a chip
    • 内置自检芯片中的多个存储器
    • US06360342B1
    • 2002-03-19
    • US09268666
    • 1999-03-16
    • Kuen-Jong LeeJing-Yane WuWen-Ben Jone
    • Kuen-Jong LeeJing-Yane WuWen-Ben Jone
    • G11C2900
    • G11C29/40G11C29/14G11C29/26
    • A new built-in self-test architecture for multiple memories in a chip is proposed in the present invention. In this architecture, all memories under test are tested in parallel using only one address generator. When the address generated from the address generator exceeds one memory's address space the memory is turned off by a BIST controller. Each word in each memory is tested by a scan-in/out method. That is, the D flip-flops in the input and output ports of each memory are connected in series and form two scan chains, respectively. Only one data input and one data output are required for the scan chains of each memory. The outputs of all scan chains are connected to a self checker for fault analysis in parallel. The address generator, data generator, self checker and the test controller are all built in a chip to satisfy the requirement of built-in self-testing.
    • 本发明提出了一种用于芯片中的多个存储器的新的内置自检架构。 在这种架构中,所有被测试的存储器只使用一个地址发生器并行测试。 当地址发生器产生的地址超过一个存储器的地址空间时,BIST控制器关闭存储器。 每个内存中的每个单词都通过扫描/输出方法进行测试。 也就是说,每个存储器的输入和输出端口中的D触发器分别串联并形成两个扫描链。 每个存储器的扫描链只需要一个数据输入和一个数据输出。 所有扫描链的输出端连接到自检器并行进行故障分析。 地址发生器,数据发生器,自检器和测试控制器都内置在芯片中,以满足内置自检的要求。