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    • 2. 发明授权
    • Mux scan cell with delay circuit for reducing hold-time violations
    • 具有延迟电路的Mux扫描单元,以减少持续时间违规
    • US06895540B2
    • 2005-05-17
    • US10064475
    • 2002-07-18
    • Wang-Jin ChenChen-Teng FanCheng-I Huang
    • Wang-Jin ChenChen-Teng FanCheng-I Huang
    • G01R31/3185G01R31/28G06F9/45H01L25/00
    • G01R31/318594G01R31/318541
    • A mux scan cell includes a multiplexer having a first input node for receiving raw data, a second input node for receiving test data, an output node, a selection node, and a delay circuit electrically connected between the second input node and the output node for prolonging a traveling time which the test data takes to travel from the second input node to the output node. The mux scan cell also includes a flip-flop connected to the multiplexer. With the delay circuit, the traveling time of the test data is prolonged such that the traveling time which the test data takes to travel from the second input node to the output node simulates a sum of a traveling time in which the raw data travels through a combinational logic and a traveling time in which the raw data travels from the first input node to the output node.
    • 多路复用扫描单元包括多路复用器,其具有用于接收原始数据的第一输入节点,用于接收测试数据的第二输入节点,输出节点,选择节点和电连接在第二输入节点和输出节点之间的延迟电路,用于 延长测试数据从第二输入节点到输出节点行进的行进时间。 复用器扫描单元还包括连接到多路复用器的触发器。 利用延迟电路,延长测试数据的行进时间,使得测试数据从第二输入节点行进到输出节点的行进时间模拟原始数据行进通过的行进时间的总和 组合逻辑和原始数据从第一输入节点传播到输出节点的行进时间。
    • 4. 发明授权
    • Memory test system for peak power reduction
    • 用于峰值功率降低的内存测试系统
    • US06978411B2
    • 2005-12-20
    • US10265700
    • 2002-10-08
    • Cheng-I HuangChen-Teng FanWang-Jin ChenJyh-Herny Wang
    • Cheng-I HuangChen-Teng FanWang-Jin ChenJyh-Herny Wang
    • G11C29/56G01R31/28
    • G11C29/56012G11C29/56
    • A memory test system for peak power reduction. The memory test system includes a plurality of memories, a plurality of memory built-in self-test circuits and a plurality of delay units. Each of the memory built-in self-test circuits comprises a built-in self-test controller for receiving a clock signal and producing a plurality of required control signals to test one of the memories. Each of the delay units is coupled between two adjacent built-in self-test controllers. The clock signal input to one of the built-in self-test controllers is received by the delay unit to produce a delayed clock signal, and the delay unit outputs the delayed clock signal to the other.
    • 用于峰值功率降低的记忆测试系统。 存储器测试系统包括多个存储器,多个存储器内置自检电路和多个延迟单元。 每个存储器内置的自检电路包括内置的自检控制器,用于接收时钟信号并产生多个所需的控制信号以测试其中一个存储器。 每个延迟单元耦合在两个相邻的内置自检控制器之间。 输入到内置自检控制器之一的时钟信号由延迟单元接收以产生延迟的时钟信号,并且延迟单元将延迟的时钟信号输出到另一个。
    • 6. 发明授权
    • Programmable clock trunk architecture
    • 可编程时钟中继架构
    • US06380788B1
    • 2002-04-30
    • US09853179
    • 2001-05-09
    • Chen-Teng FanJyh-Herng WangYu-Wen TsaiPeng-Chuan Huang
    • Chen-Teng FanJyh-Herng WangYu-Wen TsaiPeng-Chuan Huang
    • H03K300
    • H03K19/1774G06F1/10H03K5/15013H03K19/1778
    • A clock architecture including a clock source, a multi-phase clock signal generator, a control bus, a number of clock signal lines, and at least one circuit block. The clock source generates a global clock signal, which is then transferred to the multi-phase clock signal generator connected to the clock source. Upon receipt of global clock signal, the multi-phase clock signal generator, which is connected to a control bus, generates clock signals of different phases according to the signals from the control bus. Each of the clock signal branches transfers one of the clock signals of different phases, wherein each of the clock signal branches is individually connected to the circuit block through an electrical switch. Only one switch is at an on state at one time, so that the clock signal of a corresponding phase is transferred to the circuit block. The driving forces applied on the clock buffer connected to the clock source and the clock buffers on the branches are adjustable for reducing clock skew. Alternately, programmable delay buffers can be used for achieving the same goal.
    • 一种时钟架构,包括时钟源,多相时钟信号发生器,控制总线,多个时钟信号线以及至少一个电路块。 时钟源产生一个全局时钟信号,然后传输到连接到时钟源的多相时钟信号发生器。 在接收到全局时钟信号时,连接到控制总线的多相时钟信号发生器根据来自控制总线的信号产生不同相位的时钟信号。 每个时钟信号分支传送不同相位的时钟信号中的一个,其中每个时钟信号分支通过电开关单独连接到电路块。 一次只有一个开关处于导通状态,使相应相位的时钟信号传送到电路块。 连接到时钟源的时钟缓冲器和分支上的时钟缓冲器的驱动力可调,以减少时钟偏移。 或者,可以使用可编程延迟缓冲器来实现相同的目标。
    • 7. 发明授权
    • Chip capacitance measurement circuit
    • 片式电容测量电路
    • US06404222B1
    • 2002-06-11
    • US09631342
    • 2000-08-02
    • Chen-Teng FanJyh-Herng Wang
    • Chen-Teng FanJyh-Herng Wang
    • G01R3126
    • G01R27/2605G01R31/2639
    • A silicon chip capacitance measurement circuit including three pairs of completely matched MOS transistors divided into two symmetrical circuits. Capacitance of a capacitor within the silicon chip is measured using the difference in average charging current flowing from the measurement circuit via a left and a right capacitor. A power supply provides a constant voltage source to the measurement circuit. A current measuring device measures the current flowing from the power supply to the measurement circuit. A signal generator provides a group of three-phase non-overlapping signals to the measurement circuit. The capacitance measurement circuit is able to limit measurement error due to the return of different size negative currents leading to the transient switching of MOS transistors in the current measurement device so that accuracy of capacitance measurement improves.
    • 一种硅芯片电容测量电路,包括三对完全匹配的MOS晶体管,分为两个对称电路。 使用从测量电路经由左右电容器流出的平均充电电流的差异来测量硅芯片内的电容器的电容。 电源为测量电路提供恒定电压源。 电流测量装置测量从电源流向测量电路的电流。 信号发生器向测量电路提供一组三相不重叠的信号。 电容测量电路能够限制由于不同尺寸的负电流的返回导致的测量误差,导致电流测量装置中的MOS晶体管的瞬态切换,从而提高了电容测量的精度。