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    • 64. 发明申请
    • Robust Cable Connectivity Test Receiver For High-Speed Data Receiver
    • 用于高速数据接收器的坚固的电缆连接测试接收器
    • US20080316930A1
    • 2008-12-25
    • US11766268
    • 2007-06-21
    • Huihao XuLouis L. HsuKevin G. KramerJames D. RockrohrMichael A. Sorna
    • Huihao XuLouis L. HsuKevin G. KramerJames D. RockrohrMichael A. Sorna
    • G01R31/08
    • G01R31/041G01R31/026
    • A system is provided for detecting a fault in a signal transmission path. In one embodiment, the system can include a variable amplitude signal attenuator which is operable to modify an input signal by variably attenuating a signal voltage swing of the input signal. Desirably, the input signal is attenuated only when transitioning from a high signal voltage level towards a low signal voltage level d variably, such that a larger high-to-low signal voltage swing is attenuated more than a smaller high-to-low signal voltage swing. Desirably, a comparator, which may apply hysteresis to the output signals, may detect a crossing of a reference voltage level by the modified input signal. In this way, when the comparator does not detect an expected crossing of the reference voltage level by the modified input signal, a determination can be made that a fault exists in the signal transmission path.
    • 提供了一种用于检测信号传输路径中的故障的系统。 在一个实施例中,系统可以包括可变幅度信号衰减器,其可操作以通过可变地衰减输入信号的信号电压摆幅来修改输入信号。 期望地,只有当从高信号电压电平转换到低信号电压电平d时,输入信号才被衰减,使得较高的高电平到低的信号电压摆幅比较小的高到低的信号电压衰减 摇摆。 期望地,可能对输出信号施加迟滞的比较器可以检测参考电压电平与修改的输入信号的交叉。 以这种方式,当比较器没有检测到通过修改的输入信号的参考电压电平的预期交叉时,可以确定在信号传输路径中存在故障。
    • 68. 发明授权
    • Programmable impedance matching circuit and method
    • 可编程阻抗匹配电路及方法
    • US07145413B2
    • 2006-12-05
    • US10250177
    • 2003-06-10
    • Louis L. HsuJoseph NatonioDaniel W. StoraskaWilliam F. Washburn
    • Louis L. HsuJoseph NatonioDaniel W. StoraskaWilliam F. Washburn
    • H03H7/38
    • H03H7/38
    • As disclosed herein, a microelectronic circuit and method are provided for improving signal integrity at a transmission line. The circuit includes a programmably adjustable impedance matching circuit which is coupled to a transmission line which includes a programmably adjustable inductive element. The programmably adjustable impedance matching circuit is desirably provided on the same chip as a receiver or transmitter to which the transmission line is coupled, or alternatively, on an element packaged together with the chip that includes the receiver or transmitter. The impedance of the programmably adjustable impedance matching circuit is adjustable in response to control input to improve signal integrity at the transmission line.
    • 如本文所公开的,提供微电子电路和方法来改善传输线处的信号完整性。 该电路包括可编程调节的阻抗匹配电路,其耦合到包括可编程调节的电感元件的传输线。 可编程可调节阻抗匹配电路理想地设置在与传输线耦合的接收器或发射器相同的芯片上,或者替代地在与包括接收器或发射器的芯片一起封装的元件上。 可编程可调阻抗匹配电路的阻抗可以响应于控制输入而调节,以改善传输线处的信号完整性。