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    Filtering for electronic module test
    1.
    发明授权
    Filtering for electronic module test 失效
    过滤电子模块测试

    公开(公告)号：US5541520A

    公开(公告)日：1996-07-30

    申请号：US333084

    申请日：1994-10-31

    申请人： Li-Cheng R. Zai ,  Shaul Halevi

    发明人： Li-Cheng R. Zai ,  Shaul Halevi

    IPC分类号： G01R19/12 ,  G01R29/02

    CPC分类号： G01R29/02 ,  G01R19/12

    摘要： A method and apparatus for determining when transient responses of a signal have ended. A plurality of filters is provided. Operation of success of filters is cause to begin at successive times. The convergence of the outputs of the various filters is then tested. When convergence is detected, the signal provided by the first started filter of the successive filters that indicated convergence is used as an output signal. The signal is typically an electronic module test signal from an electronic module. Testing for convergence is performed by averaging outputs of each filter started to determine an average value; determining a deviation of each output of the filters from the average value; totaling the deviation to determine a total deviation; and comparing the total deviation to a reference level. Preferably, the total deviation is integrated over a period of time to provide an integrated total deviation; and the integrated total derivation is compared to the reference level.

    摘要翻译： 一种用于确定信号的瞬态响应何时结束的方法和装置。 提供多个滤波器。 过滤器的成功运行是连续开始的原因。 然后测试各种滤波器的输出的收敛。 当检测到收敛时，将由收敛的连续滤波器的第一起始滤波器提供的信号用作输出信号。 该信号通常是来自电子模块的电子模块测试信号。 通过平均每个滤波器的输出来确定收敛的测试来确定平均值; 确定滤波器的每个输出与平均值的偏差; 总计偏差确定总偏差; 并将总偏差与参考水平进行比较。 优选地，总偏差在一段时间内积分以提供积分总偏差; 并将综合总导数与参考水平进行比较。

    Method and system for controlling high-speed probe actuators
    3.
    发明授权
    Method and system for controlling high-speed probe actuators 失效
    控制高速探头执行器的方法和系统

    公开(公告)号：US5635848A

    公开(公告)日：1997-06-03

    申请号：US402417

    申请日：1995-03-10

    申请人： James M. Hammond ,  James C. Mahlbacher ,  Kenneth G. Roessler ,  Michael Servedio ,  Li-Cheng R. Zai

    发明人： James M. Hammond ,  James C. Mahlbacher ,  Kenneth G. Roessler ,  Michael Servedio ,  Li-Cheng R. Zai

    IPC分类号： G01R1/067 ,  G01R1/073

    CPC分类号： G01R1/06705

    摘要： A digital and analog controller for controlling a high-speed probe actuator is disclosed. This method and system provide the probe actuator system with improved damping ratio and reduced impact force, so the throughput of the tester is increased with fast settling actuator armature. With this method and system, the steady-state probe force is less sensitive to the servo system, test probe and variation in the probing distance d. An electronic circuit, which consists of analog operational amplifiers, monostable multivibrators, and D flip-flops, is presented for low-cost applications.

    摘要翻译： 公开了一种用于控制高速探头致动器的数字和模拟控制器。 该方法和系统为探头致动器系统提供了改进的阻尼比和减小的冲击力，因此测试仪的生产量随着快速沉降执行器电枢而增加。 利用这种方法和系统，稳态探头力对伺服系统，测试探头和探测距离d的变化敏感度较低。 一个电子电路由模拟运算放大器，单稳态多谐振荡器和D触发器组成，用于低成本应用。