公开(公告)号：US20090309611A1

公开(公告)日：2009-12-17

申请号：US12423704

申请日：2009-04-14

申请人： Robert Karl Butler ,  Vijaya Ceekala ,  Jim Wieser

发明人： Robert Karl Butler ,  Vijaya Ceekala ,  Jim Wieser

IPC分类号： G01R31/00

CPC分类号： G01R19/16528

摘要： A cable detector includes one or more peak detectors that detect when a termination impedance is missing from the output of a line driver. A peak detection signal is asserted when signals on a transmission line exceed a threshold level. A fault condition is asserted when the peak detection signal is asserted for a sufficient length of time to indicate that an actual fault is detected. The time period required for detecting a lost or missing line termination is longer than the time periods for any one of the pathological conditions to avoid a false positive detection. After the peak detection signal is de-asserted, the fault condition will be maintained until another sufficient length of time has expired without a peak detection.

摘要翻译： 电缆检测器包括一个或多个峰值检测器，其检测何时从线路驱动器的输出丢失终端阻抗。 当传输线上的信号超过阈值电平时，峰值检测信号被断言。 当峰值检测信号被断言足够的时间长度以指示检测到实际故障时，断言故障条件。 检测丢失或缺失线终止所需的时间长于任何一种病理状况的时间段，以避免假阳性检测。 在峰值检测信号被取消断言之后，故障状态将保持到另一个足够长的时间到期而没有峰值检测。

公开(公告)号：US08294473B2

公开(公告)日：2012-10-23

申请号：US12423704

申请日：2009-04-14

申请人： Robert Karl Butler ,  Vijaya Ceekala ,  Jim Wieser

发明人： Robert Karl Butler ,  Vijaya Ceekala ,  Jim Wieser

IPC分类号： G01R31/02

CPC分类号： G01R19/16528

摘要： A cable detector includes one or more peak detectors that detect when a termination impedance is missing from the output of a line driver. A peak detection signal is asserted when signals on a transmission line exceed a threshold level. A fault condition is asserted when the peak detection signal is asserted for a sufficient length of time to indicate that an actual fault is detected. The time period required for detecting a lost or missing line termination is longer than the time periods for any one of the pathological conditions to avoid a false positive detection. After the peak detection signal is de-asserted, the fault condition will be maintained until another sufficient length of time has expired without a peak detection.

摘要翻译： 电缆检测器包括一个或多个峰值检测器，其检测何时从线路驱动器的输出丢失终端阻抗。 当传输线上的信号超过阈值电平时，峰值检测信号被断言。 当峰值检测信号被断言足够的时间长度以指示检测到实际故障时，断言故障条件。 检测丢失或缺失线终止所需的时间长于任何一种病理状况的时间段，以避免假阳性检测。 在峰值检测信号被取消断言之后，故障状态将保持到另一个足够长的时间到期而没有峰值检测。

公开(公告)号：US20090108906A1

公开(公告)日：2009-04-30

申请号：US11924565

申请日：2007-10-25

申请人： Robert Karl Butler

发明人： Robert Karl Butler

IPC分类号： H03K17/16

CPC分类号： H04N5/268

摘要： A system, apparatus and method are arranged for monitoring an input signal for a line driver and determining if a valid data signal is present. When the input signal is determined to be an invalid data signal, an offset is introduced into the input stage of the line driver to prevent noise induced toggling of the output of the line driver. When the input signal is determined to be a valid data signal, the offset is removed from the input stage since inclusion of the offset can introduce undesirable duty cycle distortion in the output of the line driver. By dynamically adding or removing the offset from the input stage of the line driver, invalid signals are prevented from toggling the output of the line driver while preserving a clean data transmission for valid signals.

摘要翻译： 布置了用于监视线路驱动器的输入信号并确定是否存在有效数据信号的系统，装置和方法。 当输入信号被确定为无效数据信号时，偏移被引入线路驱动器的输入级，以防止噪声引起线路驱动器的输出的切换。 当输入信号被确定为有效数据信号时，偏移从输入级移除，因为包含偏移可能在线路驱动器的输出中引入不期望的占空比失真。 通过从线路驱动器的输入级动态地添加或去除偏移，防止无效信号切换线路驱动器的输出，同时保持用于有效信号的干净的数据传输。

公开(公告)号：US07538589B2

公开(公告)日：2009-05-26

申请号：US11924565

申请日：2007-10-25

申请人： Robert Karl Butler

发明人： Robert Karl Butler

IPC分类号： H03K3/00

CPC分类号： H04N5/268

摘要： A system, apparatus and method are arranged for monitoring an input signal for a line driver and determining if a valid data signal is present. When the input signal is determined to be an invalid data signal, an offset is introduced into the input stage of the line driver to prevent noise induced toggling of the output of the line driver. When the input signal is determined to be a valid data signal, the offset is removed from the input stage since inclusion of the offset can introduce undesirable duty cycle distortion in the output of the line driver. By dynamically adding or removing the offset from the input stage of the line driver, invalid signals are prevented from toggling the output of the line driver while preserving a clean data transmission for valid signals.

摘要翻译： 布置了用于监视线路驱动器的输入信号并确定是否存在有效数据信号的系统，装置和方法。 当输入信号被确定为无效数据信号时，偏移被引入线路驱动器的输入级，以防止噪声引起线路驱动器的输出的切换。 当输入信号被确定为有效数据信号时，偏移从输入级移除，因为包含偏移可能在线路驱动器的输出中引入不期望的占空比失真。 通过从线路驱动器的输入级动态地添加或去除偏移，防止无效信号切换线路驱动器的输出，同时保持用于有效信号的干净的数据传输。

公开(公告)号：US07532043B1

公开(公告)日：2009-05-12

申请号：US11925515

申请日：2007-10-26

申请人： Robert Karl Butler

发明人： Robert Karl Butler

IPC分类号： H03K17/00

CPC分类号： H04N7/108 ,  H04N7/104

摘要： The present disclosure relates to a system, apparatus and method for a line driver circuit to generate a signal detect (SD) signal when an invalid data signal is detected at its input. An invalid signal may be present either when no signal is available or when the line driver circuit or another component in the system (e.g., a crosspoint switch, a multiplexer, etc.) fails. The SD signal is coupled to an external controller that can either power down the line driver circuit to save power when no signal is available, or change over to a different line driver circuit or other component of the system when a failure is identified. When the input signal is determined to be a valid data signal via the SD signal, the line driver circuit can be enabled for operation. The described systems, apparatus and methods can save the user from having to directly control the line driver power state, especially in systems with large router configurations that may include hundreds of line drivers.

摘要翻译： 本公开涉及当在其输入端检测到无效数据信号时线路驱动电路产生信号检测（SD）信号的系统，装置和方法。 当没有信号可用时或当线路驱动器电路或系统中的另一个组件（例如交叉点开关，多路复用器等）出现故障时，可能会出现无效信号。 SD信号耦合到外部控制器，该外部控制器可以在没有信号可用时将线路驱动器电路断电以节省功率，或者当识别故障时，将其切换到不同的线路驱动器电路或系统的其他部件。 当通过SD信号将输入信号确定为有效数据信号时，线路驱动器电路可以被使能以进行操作。 所描述的系统，装置和方法可以保存用户不必直接控制线路驱动器的电源状态，特别是在具有可能包括数百个线路驱动器的大型路由器配置的系统中。

公开(公告)号：US20090108907A1

公开(公告)日：2009-04-30

申请号：US11925515

申请日：2007-10-26

申请人： Robert Karl Butler

发明人： Robert Karl Butler

IPC分类号： H03K17/16

CPC分类号： H04N7/108 ,  H04N7/104

摘要： The present disclosure relates to a system, apparatus and method for a line driver circuit to generate a signal detect (SD) signal when an invalid data signal is detected at its input. An invalid signal may be present either when no signal is available or when the line driver circuit or another component in the system (e.g., a crosspoint switch, a multiplexer, etc.) fails. The SD signal is coupled to an external controller that can either power down the line driver circuit to save power when no signal is available, or change over to a different line driver circuit or other component of the system when a failure is identified. When the input signal is determined to be a valid data signal via the SD signal, the line driver circuit can be enabled for operation. The described systems, apparatus and methods can save the user from having to directly control the line driver power state, especially in systems with large router configurations that may include hundreds of line drivers.

摘要翻译： 本公开涉及当在其输入端检测到无效数据信号时线路驱动电路产生信号检测（SD）信号的系统，装置和方法。 当没有信号可用时或当线路驱动器电路或系统中的另一个组件（例如交叉点开关，多路复用器等）出现故障时，可能会出现无效信号。 SD信号耦合到外部控制器，该外部控制器可以在没有信号可用时将线路驱动器电路断电以节省功率，或者当识别故障时，将其切换到不同的线路驱动器电路或系统的其他部件。 当通过SD信号将输入信号确定为有效数据信号时，线路驱动器电路可以被使能以进行操作。 所描述的系统，装置和方法可以保存用户不必直接控制线路驱动器的电源状态，特别是在具有可能包括数百个线路驱动器的大型路由器配置的系统中。