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    • 2. 发明申请
    • USING A PARAMETRIC MEASUREMENT UNIT FOR CONVERTER TESTING
    • 使用参数测量单元进行转换器测试
    • WO2006071635A3
    • 2006-11-02
    • PCT/US2005046132
    • 2005-12-16
    • TERADYNE INCWALKER ERNEST PSARTSCHEV RONALD A
    • WALKER ERNEST PSARTSCHEV RONALD A
    • H03M1/10H03M1/06
    • H03M1/1071
    • In one aspect, the invention is an integrated circuit (IC) for use in testing an analog-to-digital (ADC) converter includes a first channel of a parametric measurement unit (PMU) configured to send a force signal to the ADC. The IC also includes a first digital-to-analog converter (DAC) connected to the first channel of the PMU. The DAC has a DC level of accuracy of less than 1 millivolt.In another aspect, the invention is an integrated circuit (IC) for use in testing a digital-to-analog-converter-device-under-test (DACDUT). The IC includes a first channel of a parametric measurement unit (PMU) configured to send a force signal to the DACDUT and including an output port for taking measurements, a first digital-to-analog converter (DAC) connected to the first channel of the PMU and a PMU measurement path connected to the output port having a DC level of accuracy of less than 1 mV.
    • 一方面,本发明是用于测试模数(ADC)转换器的集成电路(IC),包括被配置为向ADC发送强制信号的参数测量单元(PMU)的第一通道。 该IC还包括连接到PMU的第一通道的第一个数模转换器(DAC)。 DAC具有小于1毫伏的精度的DC电平。另一方面,本发明是用于测试数模转换器器件(DACDUT)的集成电路(IC)。 IC包括被配置为向DACDUT发送强制信号并包括用于进行测量的输出端口的参数测量单元(PMU)的第一通道,连接到第一通道的第一数模转换器(DAC) PMU和连接到具有小于1mV的精度的DC电平的输出端口的PMU测量路径。
    • 5. 发明申请
    • STROBE TECHNIQUE FOR TEST OF DIGITAL SIGNAL TIMING
    • 用于数字信号时序测试的STROBE技术
    • WO2007038233A3
    • 2008-10-30
    • PCT/US2006036912
    • 2006-09-22
    • TERADYNE INCSARTSCHEV RONALD AWALKER ERNEST P
    • SARTSCHEV RONALD AWALKER ERNEST P
    • G11C29/00G11C7/00
    • G01R31/31937G01R31/31726G11C29/56G11C29/56004G11C29/56012
    • A test system timing method simulates the timing of a synchronous clock on the device under test. Strobe pulses can be generated by routing an edge generator to delay elements with incrementally increasing delay values. A data signal or synchronous clock signal can be applied to the input of each of a set of latches which are clocked by the strobe pulses. An encoder can convert the series of samples which are thereby latched to a word representing edge time and polarity of the sampled signal. If the sampled signal is a data signal, the word can be stored in memory. If the sampled signal is a clock signal, the word is routed to a clock bus and used to address the memory. The difference between clock edge time and data edge time is provided and can be compared against expected values.
    • 测试系统定时方法模拟被测设备上同步时钟的时序。 可以通过将边沿发生器路由到具有逐渐增加的延迟值的延迟元件来产生选通脉冲。 可以将数据信号或同步时钟信号施加到由选通脉冲计时的一组锁存器中的每一个的输入。 编码器可以将由此锁存的一系列样本转换成表示采样信号的边沿时间和极性的字。 如果采样信号是数据信号,则该字可以存储在存储器中。 如果采样信号是时钟信号,则该字路由到时钟总线,用于寻址存储器。 提供时钟边沿时间和数据边沿时间之间的差异,并将其与预期值进行比较。
    • 6. 发明申请
    • STROBE TECHNIQUE FOR RECOVERING A CLOCK IN A DIGITAL SIGNAL
    • 用于在数字信号中恢复时钟的STROBE技术
    • WO2007038339A3
    • 2007-12-06
    • PCT/US2006037099
    • 2006-09-22
    • TERADYNE INCSARTSCHEV RONALD AWALKER ERNEST P
    • SARTSCHEV RONALD AWALKER ERNEST P
    • H04L7/00
    • G01R31/31937G01R31/31726G11C29/56G11C29/56004G11C29/56012
    • A method and apparatus is provided to recover clock information embedded in a digital signal such as a digital signal A set of strobe pulses can be generated by routing an edge generator to a delay elements with incrementally increasing delay values A set of latches triggered by incrementally delayed signals from the edge generator can capture samples of the data signal An encoder (84) can convert the samples to a word representing edge time and polarity of the sampled signal The word representing edge time can be stored in memory (86) An accumulator can collect the average edge time over N samples (88) The average edge time can be adjusted with a fixed de-skew value to form the extracted clock information The extracted clock information can be used as pointer to the words stored in memory
    • 提供了一种方法和装置来恢复嵌入在诸如数字信号的数字信号中的时钟信号。可以通过将边沿发生器路由到具有递增增加的延迟值的延迟元件来产生一组选通脉冲。通过增量延迟触发一组锁存器 来自边缘发生器的信号可以捕获数据信号的采样编码器(84)可以将样本转换为表示采样信号的边沿时间和极性的字。表示边沿时间的字可以存储在存储器中(86)累加器可以收集 平均边缘时间超过N个样本(88)平均边沿时间可以用固定的去偏移值调整以形成提取的时钟信息提取的时钟信息可以用作指向存储在存储器中的字的指针